Mystim The Duke 51mm Surgical Steel Cock Ring

This is a fixed-diameter cock ring made from 100% surgical stainless steel, finished polished with a defined edged profile. Unlike stretchy silicone rings, this type gives a firm, consistent hold and the weight and rigidity of steel add a tactile, jewellery feel. The 51 mm measurement is the internal diameter; that converts to a circumference of about 160 mm, so it’s a specific fit rather than adjustable.

Technical Specifications

How to Use

Measure carefully before buying: wrap a flexible band or strip of paper around the base of the penis and testicles where the ring will sit, mark the join, measure that length in millimetres and divide by π (3.14) to find the diameter. Repeat the measurement on different days/times to allow for natural changes. If you’re unsure, pick a slightly larger ring — a metal ring does not stretch. Never force the ring over an erect penis; the recommended method is to first place the ring around the testicles and then bring the penis through. Do not wear for more than 30 minutes at a time. If removal is tricky, use a generous amount of water-based or silicone lubricant to ease it off.

Cleaning and Care

Surgical stainless steel is very low-maintenance: wash after use with warm water and mild soap or a dedicated toy cleaner. For full sterilisation you can boil the ring for a few minutes or use a medical-grade disinfectant — it tolerates heat and most sanitising agents. Dry thoroughly and store separately to avoid scratches. Steel is compatible with water-based and silicone lubricants; if you’re using latex condoms, prefer water-based lubricant to avoid potential weakening from oil-based products.

For those who want a rigid, weighty stainless steel cock ring and already know their correct size.