How to Choose a Dildo: A Beginner’s Guide to Size, Shape and Material

Choosing a dildo​ can feel more complicated than it should.

One product page focuses on length. Another lists diameter. Some toys are soft and flexible, while others are firm, curved, realistic​, textured, suction-based​ or designed for a harness. Even labels such as small, medium and large can mean very different things between brands.

The best dildo is not automatically the biggest, most realistic or most expensive option. It is the one that matches the sensation you want, feels manageable for your body and suits the way you plan to use it.

For a beginner​, that usually means starting with a smooth shape, a comfortable width and a material you can care for confidently. You can always explore more length, fullness, texture or firmness later if those qualities genuinely appeal to you.

This guide will help you understand dildo​ measurements, materials and shapes so you can choose with confidence instead of guesswork.

How to Choose a Dildo: The Quick Guide

Start with what you want to feel, then choose the product features that create that sensation.

What Is a Dildo?

A dildo​ is a pleasure product designed primarily for penetration. Unlike a vibrator​, it does not need a motor to create sensation, although some dildos include vibrating functions.

Dildos can be used vaginally, with a compatible harness, against external areas or anally when the toy has a genuinely secure flared base. They come in realistic and non-realistic shapes, with materials ranging from soft silicone and elastomers to glass and metal.

Some people enjoy the feeling of fullness. Others prefer focused pressure against a particular internal area. Some like controlling every movement by hand, while others use a suction base or strap-on​ harness.

There is no single experience that a dildo is supposed to create. The right choice depends on the person using it.

Start With Three Measurements

Product photographs rarely show scale accurately. Before buying, look for three measurements: insertable length, diameter and girth.

Insertable length

Insertable length is the portion of the shaft intended to enter the body.

This may be shorter than the total product length because the measurement can exclude a suction cup, flared base, handle or control section.

A longer dildo does not need to be inserted fully. However, controlling unused length still requires attention, especially during partnered or harness play. If you know you prefer shallow penetration, an extremely long toy may add inconvenience without adding pleasure.

Diameter

Diameter measures straight across the widest part of the insertable shaft.

For many beginners​, diameter has a greater effect on comfort than length. A narrow, longer toy may feel more manageable than a short but very wide design.

Look at whether the listed diameter applies to the widest point, the shaft or the head. Realistic​ and contoured dildos may not have the same width from tip to base.

Girth or circumference

Girth measures around the shaft.

Do not compare a girth number directly with a diameter number. They describe different measurements. If a product page lists only one of them, use a conversion calculator or compare it with a toy you already own rather than guessing.

What Size Dildo Is Best for a Beginner?

There is no universal beginner size.

Comfort depends on anatomy, experience, arousal, pelvic-floor tension, lubricant​, material firmness and the type of penetration. A size that feels easy to one person may feel too demanding to another.

For a first dildo, prioritise:

If you already know that a particular finger size, partner or smaller toy feels comfortable, those experiences may provide a more useful reference than a generic small or medium label.

Do not choose a larger dildo because you think you should progress towards it. Size is a preference, not an achievement.

Does Dildo Length Matter?

Yes, but available length and desired depth are not the same thing.

A longer toy gives you a wider range of possible depth. It can also make shallow movement harder to control if the toy is heavy, flexible or being used by a partner.

Ask yourself:

There is nothing wrong with choosing an extra-long dildo​ for fantasy or display. Just make sure the person receiving it controls the depth and no one treats the full length as a target.

Does Dildo Firmness Matter?

Firmness changes how clearly the body feels the toy’s shape.

Softer and more flexible dildos

A soft dildo can move with the body and may feel more forgiving against sensitive internal tissue. It can be an approachable option for beginners and people who prefer gentler pressure.

Very flexible toys may bend during insertion and can require more hand control. They may also feel less precise when used in a strap-on harness.

Medium-firm dildos

A medium-firm toy balances flexibility with directional control.

It can be easier to guide by hand, provide noticeable internal pressure and remain stable in a compatible harness without feeling completely rigid.

Firm dildos

Glass, metal and firmer silicone products do not compress as much against the body.

This can create precise, focused pressure with less physical movement. It also means the body feels the toy’s full diameter, angle and texture. Choose a conservative size if you are new to firm materials.

Firm is not automatically intense and soft is not automatically gentle. Size, shape, speed and pressure still matter.

The Main Dildo Shapes

Smooth straight dildos

A simple, smooth shaft is often easiest for learning what depth, pressure and rhythm you enjoy.

Without dramatic ridges or curves, the user can change the angle gradually and receive clear feedback from the body.

Curved dildos

A curved shaft is designed to apply more pressure in a particular direction.

Some users angle the curve towards the front wall of the vagina for G-area stimulation. Others use a suitable anal toy to explore prostate-focused pressure. Small changes in angle can make a noticeable difference, so begin slowly rather than thrusting deeply.

Realistic dildos​

Realistic designs may include a defined head, veins, skin-like colouring or testicles at the base.

The head and texture can make a realistic dildo​ feel fuller than a completely smooth product with similar measurements. If you are a beginner​, look for a gentler head shape and softer surface rather than choosing only by appearance.

Non-realistic or sculptural dildos

These use abstract curves, smooth geometric shapes or colourful finishes.

They can feel less visually anatomical while still providing satisfying penetration. The shape may also be designed for easier grip, targeted pressure or display.

Textured dildos

Ribs, waves, bumps and pronounced veins increase surface sensation.

Texture can feel stimulating, but it also creates more friction. Use generous lubricant and choose lighter texture for a first toy if you are unsure about sensitivity.

Suction-cup dildos​

A broad suction base can attach to a smooth, clean, nonporous surface for hands-free play.

Test the suction with your hand before use. The base should remain secure during gentle movement, but you should still keep the toy within reach and avoid positions where a sudden release could cause a fall or strain.

Harness-compatible dildos​

Most harness-compatible dildos have a broad flared base that sits behind an O-ring or front panel.

Check the diameter near the base against the harness ring size. A dildo​ that is too narrow may wobble or slip through, while one that is too wide may not fit.

Double-ended dildos

A double-ended dildo may be designed for two partners or for one person to enjoy two points of stimulation.

These toys require clear communication because movement by one person affects the other. Flexible designs are usually easier to position, but both users should be able to stop immediately.

How to Choose a Dildo Material

Material affects firmness, texture, lubricant compatibility, cleaning and storage.

Silicone

Silicone dildos are available in a wide range of firmness levels and shapes. A smooth silicone toy can feel soft, warm quickly against the body and provide some flexibility.

Water-based lubricant​ is the simplest default. Some silicone lubricants​ may affect some silicone toy surfaces, so check both product instructions before combining them.

Clean silicone toys according to the manufacturer’s care guidance. Do not assume every silicone product can be boiled, placed in a dishwasher or treated with harsh disinfectants.

Glass

Purpose-made borosilicate glass toys are firm, smooth and easy to guide with lubricant.

Because glass does not compress, choose a manageable size. Inspect the entire surface before use and stop using the toy if you find a chip, crack or rough area.

Avoid extreme temperatures. A toy should feel comfortably warm or cool against your hand before it touches sensitive tissue.

Metal

Metal dildos are firm, weighty and highly precise.

The weight can create noticeable pressure without fast movement, but it may also fatigue the wrist during longer sessions. Check the finish for scratches, corrosion, flaking or rough edges before every use.

TPE, TPR and jelly-style materials

These materials are often soft, flexible and used for realistic-feeling products.

Care requirements vary significantly. Some soft materials are porous, which means they can retain moisture or residue more easily than nonporous materials. Follow the exact cleaning instructions​, let the toy dry thoroughly and store it away from other toys.

Water-based lubricant​ is usually the safest starting point unless the manufacturer confirms another option. A condom can make cleanup easier and is particularly useful when the toy is shared.

Replace a soft toy if the material becomes sticky, develops cracks, changes texture or retains an odour after cleaning.

Thermo-reactive materials

A thermo-reactive dildo changes firmness in response to temperature.

This lets the user explore a softer or firmer sensation with the same toy. Follow the manufacturer’s temperature instructions exactly and test the entire surface carefully before insertion. Never use a toy at a temperature that feels painfully hot or intensely cold against your hand.

Product Spotlight: Adrien Lastic Silexpan 6-Inch Dildo

The Adrien Lastic Silexpan 6-Inch Thermo-Reactive Dildo​ measures approximately 15 cm in length and 4.3 cm in diameter.

Its defining feature is the thermo-reactive construction, which allows the firmness to change with temperature. This makes it an interesting option for shoppers who are still discovering whether they prefer a softer or more structured feel.

The 15 cm length is more approachable than an extra-long design, while the 4.3 cm diameter provides a fuller sensation that may feel better suited to someone who already enjoys moderate width.

Choose it if you want:

Use only the temperature methods permitted in the product instructions, check the surface before insertion and begin with plenty of compatible lubricant.

Product Spotlight: Wooomy Knock-Knock Extra-Long Dildo

The Wooomy Knock-Knock Dildo​ in Flesh measures 38.5 cm in length and approximately 3.9 cm in diameter, with a weight of 446 g.

It is made from soft, phthalate-free jelly-style material and carries an IPX8 waterproof rating. Its defining feature is clearly its extraordinary length.

This is not an automatic beginner recommendation. It is better suited to experienced shoppers who already understand their preferred width, depth and pace—or people who enjoy the fantasy and visual impact of an extra-long toy without intending to use its full length.

Choose it if you want:

Full insertion is never required. Keep a hand near the base to control depth, use generous lubricant and stop immediately for sharp, increasing or deep pelvic pain.

Do not use any dildo​ anally unless it has a secure flared base designed to remain outside the body.

Choose According to How You Plan to Use It

For vaginal penetration

Look for a manageable diameter, smooth or preferred texture and enough base to hold securely.

Curved toys can create targeted pressure, while straight toys allow more neutral angle changes. Natural lubrication may not be enough for comfortable toy use, so keep compatible lubricant nearby.

For anal penetration

Only use a dildo with a wide, secure flared base that cannot pass into the body.

The anus does not produce its own lubricant, and the internal tissue is delicate. Choose a smaller smooth toy, apply generous lubricant and begin gradually. Stop for sharp, burning or increasing pain.

Never use an improvised object or a vaginal dildo with a narrow base anally.

For strap-on play​

Choose a dildo with a flared base that fits the harness attachment securely.

Consider weight and firmness as well as size. A heavy or very flexible toy can be harder for the wearer to control. The receiving partner should choose a diameter and length that feel manageable.

For suction-cup use​

Check the surface where you intend to attach the toy. It should be clean, smooth and strong enough to support movement.

Test the suction before positioning your body. Start with gentle movement and keep the base within reach.

For partnered hand use

Choose a base or handle that the giving partner can grip without their hand sliding onto the insertable area.

The receiving partner should guide angle, depth and rhythm. A longer toy requires especially clear communication because the person holding it cannot feel depth in the same way the receiving body can.

What Lubricant Should You Use With a Dildo?​

Water-based lubricant​ is the simplest broadly compatible choice for dildos​ and latex condoms.

Apply lubricant to the insertable part of the toy and the receiving partner’s entrance. Reapply whenever the surface begins to drag.

Silicone-based lubricant lasts longer but may affect some silicone toy surfaces. Check the toy and lubricant instructions before combining them.

Oil-based lubricants can damage latex condoms. Household lotions, shampoo, petroleum jelly and massage products are not reliable substitutes for a purpose-made intimate lubricant.

Avoid numbing products. Discomfort provides important information about size, angle, friction and pace.

How to Use a Dildo for the First Time

Step 1: Clean and inspect the toy

Wash the dildo according to its care instructions before first use and after every session.

Check the surface for cracks, peeling, stickiness, rough seams, chips or other damage. Do not use a toy that has changed condition.

Step 2: Choose a relaxed setting

Give yourself privacy and enough time to stop without pressure.

Do not make the first session a challenge to reach a certain depth or duration. Your goal is to learn what feels comfortable.

Step 3: Begin with arousal and external touch

Penetration does not need to be the first activity.

Use hands, massage, external stimulation or another favourite toy. Arousal can make insertion feel easier, but it does not create an obligation to continue.

Step 4: Apply lubricant

Coat the tip and insertable shaft. Apply lubricant to the vaginal or anal opening as well.

Use more for textured, firm or anal toys​, and keep the lubricant close enough to reapply.

Step 5: Begin with the tip

Place the rounded or tapered tip at the entrance without forcing it.

Take a slow breath and apply gentle pressure. If the muscles tighten, pause. Add lubricant, change the angle, return to external touch or stop for the day.

Step 6: Insert gradually

Advance a small amount at a time and let the body adjust.

A stretching or full sensation may feel unfamiliar, but it should remain manageable. Sharp, burning, shooting or increasing pain means stop.

Step 7: Explore small movements

Begin with shallow movement rather than immediately using the available length.

Try holding the toy still, rocking it gently or changing the angle slightly. Notice whether your body prefers pressure, movement or a combination of both.

Step 8: Keep control of the base

Hold the base or handle securely.

If the toy is long, keep a hand near the body to create a physical depth limit. During partnered play, the receiving partner can place their hand over the giver’s hand to guide movement.

Step 9: Remove it slowly

When you are ready, stop movement and withdraw gradually along the same angle.

Add lubricant around the entrance if the area feels dry. Do not pull suddenly against tense muscles.

Step 10: Clean, dry and store it​

Wash the entire toy, including the base, according to the instructions.

Rinse away any cleaner and let it dry fully before placing it in a clean pouch or separate storage container.

Sharing a Dildo Safely

Sex toys​ can carry bodily fluids and may transmit infections when shared.

The simplest option is for each person to have their own toy. If you share:

Never move a dildo from the anus to the vagina without washing it thoroughly or replacing its condom. This can transfer bacteria and cause infection.

A condom makes barrier changes easier, but it does not replace cleaning.

How to Clean and Store a Dildo​

Follow the exact care instructions because different materials and constructions require different methods.

As a general routine:

Waterproof​ does not automatically mean dishwasher-safe, boilable or suitable for bleach. Do not use extreme cleaning methods unless the manufacturer explicitly permits them.

Keep toys away from direct sunlight, high heat and contact with other materials that may react with their surfaces.

Common Dildo-Buying Mistakes

Choosing by total length alone

Width, firmness, insertable length and tip shape may affect comfort more than the headline measurement.

Assuming small, medium and large are standard

They are not. Compare actual measurements between products.

Buying for aspiration instead of present comfort

Choose the sensation you want now. A larger toy can wait until it becomes a genuine preference.

Ignoring the base

The base affects grip, suction, harness compatibility and anal safety. Check it before buying.

Using the wrong lubricant

An incompatible lubricant may damage the toy or condom. Water-based lubricant is the safest default when you are uncertain.

Treating full insertion as success

Available length is not a target. Pleasure, comfort and control matter more than depth.

Buying a textured toy without considering friction

Pronounced texture can feel more intense than expected. Use generous lubricant and begin slowly.

Forgetting storage requirements

Some soft materials can react when stored together. Keep toys clean, dry and separated.

A Sex-Therapy Perspective: Choose for Curiosity, Not Comparison

Toy shopping can quietly become a comparison exercise.

People compare themselves with product photographs, partners, pornography, online reviews or an imagined version of what an experienced person should enjoy.

Your body does not need to match someone else’s preference.

A small smooth dildo is not less adventurous than an extra-long realistic toy. A sculptural design is not more sophisticated than a traditional shape. Enjoying shallow pressure is not a stage you need to move beyond.

Before buying, ask:

A thoughtful answer to those questions will usually guide you better than a bestseller label.

Frequently Asked Questions

What dildo size is best for beginners?

There is no universal beginner size. Choose a smooth, gently tapered toy with a manageable widest diameter and enough base to control it securely. Compare the actual measurements with sensations you already know are comfortable.

Is dildo length or width more important?

Both matter, but width often has a greater effect on the stretching sensation. Length affects possible depth. Consider diameter, insertable length and firmness together rather than shopping by one number.

What is the difference between diameter and girth?

Diameter measures straight across the toy. Girth or circumference measures around it. Do not compare the two numbers directly.

Is silicone the best dildo material?

Silicone is popular because it comes in many shapes and firmness levels and can be easy to care for. Glass, metal and softer elastomers offer different sensations. The best material is one that suits your preferred firmness, use and cleaning routine.

Are firm dildos more intense?

Firm toys provide more precise pressure because they do not compress as much. This can make their width, curve and texture feel more noticeable. Choose a conservative size if you are new to firm materials.

Can I use silicone lubricant with a silicone dildo?

Not always. Some silicone lubricants may affect some silicone toy surfaces. Check both product instructions or choose water-based lubricant​ when compatibility is uncertain.

Can every dildo be used anally?

No. An anal dildo must have a wide flared base that remains outside the body. Never use a toy with a narrow, flexible or absent base anally.

Can every dildo be used with a strap-on harness?

No. The dildo needs a harness-compatible flared base, and its shaft must fit the harness ring or attachment system. Check both measurements before buying.

Can I share a dildo with my partner?

The lowest-risk option is a personal toy for each person. If sharing, use a fresh condom for each user and wash the toy between people. Replace the condom and clean the toy before changing between anal and vaginal use.

How do I know whether a dildo is too big?

If you cannot insert it without force, your muscles remain tense or you experience sharp, burning or increasing pain, stop. More lubricant or arousal may help with friction, but they do not make an unsuitable size appropriate for your body.

Do I have to insert the full length?

No. Use only the depth that feels pleasurable and controllable. Keep a hand near the base of a long toy to create a depth limit.

How often should I replace a dildo?

There is no universal schedule. Replace it when the material becomes cracked, sticky, rough, discoloured, difficult to clean or permanently odorous, or when any electronic or structural component is damaged.

Final Thoughts

Choosing a dildo​ becomes much easier when you stop asking which product is objectively best and start asking which sensation suits you.

Look at insertable length, diameter and firmness together. Choose a shape that supports the kind of pressure or movement you enjoy. Confirm that the base is appropriate for hand use, suction, a harness or anal safety, depending on your plans.

For a first toy​, smooth and manageable usually creates more room for curiosity than extreme size or texture. For experienced shoppers, longer, fuller or thermo-reactive designs can add new possibilities without turning depth or intensity into a goal.

Use compatible lubricant, begin slowly, keep control of the base and care for the toy according to its material.

Explore dildos​, lubricants​ and beginner-friendly pleasure products​ at Dear Desire, with plain, discreet delivery across South Africa.