Medium Dildos (5 to 6 Inches / 13–16 cm)

Between 5 and 6 inches, or 13 to 16cm, is where most people end up. Medium dildos occupy the range that matches average anatomy closely enough to feel complete without demanding technique, which is why this band outsells both the smaller and larger categories and why it is the most sensible place to start if you have no strong preference.

Small Dildos (Up to 5 Inches / 13 cm) | Dildos Up to 6 Inches (16 cm) | Dildos 6 to 8 Inches (16–20 cm) | All Dildos

Why This Range Works

The vaginal canal measures roughly 7 to 10cm unaroused and lengthens during arousal, typically into the low teens. A 13 to 16cm insertable length therefore reaches full depth for most people at the point of arousal, without pressing on the cervix in a way that becomes uncomfortable.

It is also long enough to be usable in a variety of positions. Very short toys can be awkward at certain angles simply because there is not enough shaft to hold onto. Medium length solves that without introducing the control problems that come with longer pieces.

Choosing Within the Range

Once you have settled on the length band, girth is the decision that remains. Around 32 to 38mm is a comfortable middle ground for most people. Below 30mm reads as slim, above 42mm as substantial. Note that softer materials compress on entry, so a soft 42mm toy can feel closer to a firm 38mm one.

Curve Matters More at This Length

At 13 to 16cm, a curved shaft puts its bend exactly where the front internal wall is most responsive, roughly 5 to 8cm in. Shorter toys often stop before the curve does any work, and longer ones place it deeper than is useful. This is a genuine advantage of the medium range rather than a marketing point.

If you are unsure, a gentle upward curve is the safer choice than a pronounced one. It still gives directional contact but remains comfortable in more positions and is easier to use with a partner.

Materials and Build

Platinum-cure silicone is the standard to hold out for: non-porous, sanitisable, holds detail and lasts. Dual-density construction, with a firm core inside a soft outer layer, is the upgrade most people notice at this size because there is enough shaft for the difference to register.

Borosilicate glass and stainless steel offer rigidity and temperature play, and both clean perfectly. They feel larger than silicone at the same measurement because nothing compresses.

TPE is softer and cheaper but porous, so it cannot be fully sanitised. If you choose it, use a condom and treat it as a personal item with a limited life. Jelly and PVC are best avoided entirely.

Using It Well

Warm up first. The canal lengthens and relaxes considerably with arousal, and inserting a medium-length toy before that happens is the most common reason people find the size uncomfortable when it should not be.

Use water-based Lubricants with silicone toys, applied generously and reapplied as needed. Find the angle before building pace, and rotate the toy slightly to see how the curve engages.

For anal use at this length, the base must be flared and the taper gradual, and a thick Anal Lubricants is not optional.

Cleaning and Storage

Wash before and after every use with warm water and a Toy Cleaners & Essentials or mild unscented soap. Solid silicone, glass and steel can be boiled or sanitised. Vibrating models should be wiped or rinsed according to their waterproof rating and never submerged unless rated IPX7.

Dry completely, store pieces separately so silicone does not react against silicone, and keep everything out of direct sunlight.

Where We Focus

Lace and Luna is family-run and British, and this is the band where we hold the deepest range. It is the size that suits most people, so it is where being selective pays off most: we would rather offer a considered choice of well-made medium dildos across different curves, girths and materials than pad the category with near-identical pieces. Material honesty matters here too, and where something is TPE rather than silicone we say so.

Orders leave in plain, unbranded packaging with nothing on the outside about the contents. UK delivery is typically three to five working days, with free shipping over £100.

Frequently Asked Questions

Is 5 to 6 inches a good size for a first dildo?

It is the most commonly chosen range and suits most people well. If you are unsure, start at the lower end of the girth range rather than the length range.

How do I choose between medium and larger?

Comfort at full depth is the test. If your current toy bottoms out and that feels good rather than uncomfortable, longer may suit. If it already reaches the limit, more girth is a better next step than more length.

Does the curve really make a difference?

At this length, yes. The bend sits at roughly the depth where the front internal wall is most responsive, which is why curved medium dildos are so popular.

What girth should I look for?

Around 32 to 38mm suits most people. Remember that softer materials compress, so a soft toy feels slightly smaller than its stated diameter.

Can medium dildos be used in a harness?

Yes, provided the base is flat and wide. This length is a practical choice for strap-on play because it is long enough to be usable and short enough to control.