Oxy brings you the best of both worlds! A chastity small enough for a tiny dick but it comes with a twist, Holy Trainer style ring that brings comfort to a chastity lifestyle. Believe us, after a few days your slave will be wondering if they'll ever get to come again... we think not
Measure the circumference around your cock from behind the balls. You can use a fabric tape measure (the kind dressmakers use) to get the measurement, or, if you don’t have one, you can use a piece of string and a ruler. Wrap the tape measure or string around your cock, going behind the balls. The tape should be snug but not tight.
Now you have your circumference you need to divide it by 3.14 to get the diameter. We’ve done some sample calculations below to show you how it works: