Start with how you want to use the dildo, then compare its insertable length, girth, material and base. These details tell you more than a headline description such as 'realistic' or 'beginner-friendly'.

Understanding size

Insertable length is the part intended to go inside your body. Overall length includes the base or handle. For dildos, inches are a familiar way to compare size, so keep the measurements in inches rather than switching between units.

Girth is the measurement around the dildo. Diameter is the measurement across it. You do not need both to express the same size: a clear insertable length and girth are usually enough, with diameter included only when it explains something useful, such as harness fit. Check where the widest measurement was taken if the shape varies.

There is no ideal beginner size for everyone. Compare the dimensions with something you already know feels comfortable, where possible. A toy's full insertable length is not an instruction to insert it all.

Shape and firmness

A straight shape, a curve and raised texture can create different kinds of contact. A curve may put pressure against the front vaginal wall, but it cannot guarantee a particular sensation or orgasm. Smooth surfaces may be easier to compare if you are unsure about texture.

Firmness matters too. Silicone products can range from flexible to quite firm. Glass and steel do not bend. Read the product's actual material and construction details rather than assuming all toys made from one material feel alike.

Suction cups and harnesses

A suction-cup dildo is designed to attach to a compatible smooth surface for hands-free use. Follow its instructions, check that it is secure before use and stop if it shifts. It will not attach reliably to every surface.

For a harness, check the attachment system and the dildo's base. Suction-cup and harness compatibility are separate features. For anal use, choose a design specifically intended for it with an appropriate external base; a suction cup alone does not establish suitability.

Lube and cleaning

Check the dildo's instructions for lubricant compatibility and cleaning. Water-based lube is often compatible with toys, but the actual product labels take priority. Do not boil a toy or put it in a dishwasher unless its maker explicitly allows that method.

Read our lubricant comparison and cleaning guide before first use. Stop if use is painful, and seek advice about recurring pain.