A dildo is an insertable toy without a motor. That plain definition covers a lot of ground: a slim starter shaft, a realistic sculpt, a glass wand, a steel rod with a handle. People use them for vaginal or anal penetration, harness play, or grinding against the outside of the body.

Length is the number printed on the box. Usable insertable length is shorter once you subtract the base you must leave outside. Girth is the measurement that actually predicts comfort. A gentle taper forgives a tight start. A blunt head asks for more patience and more lube.

Non-porous materials are easier to live with. If you want anal use, the base has to be flared, period. Suction cups let a dildo stand on a shower wall. Harness O-rings want a defined neck or a Vac-U-Lock well. None of that matters if the surface is gritty or the paint flakes. Buy boring and well finished over novelty that sheds glitter.

Selection points

• Match girth to what you already take comfortably, then step up slowly.
• Check that colorants are sealed, not rubbing off on a towel.
• Keep a dedicated anal dildo if you also use toys vaginally.
• Inspect for bubbles and seams before the first insertion.