All chastity cages the same basic components: the main ring, the cage or tube, and the locking mechanism.





THE MAIN RING





The size of the main ring of your chastity device is one of the most important measurements you must know before you buy a device. This ring is what keeps the device on. You do not want it to be too large, the device is likely to pull down and eventually slip off, neither too small as it is hazardous to health: it mustn’t be so tight as to restrict blood flow.The main ring is basically a cock ring.





First you need to 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. The last thing you want is to suffer from circulation problems, so a good time to take this measurement is after a shower or bath when your body is most likely at it’s warmest.





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:

Firstly in metric:17.3 cm ÷ 3.14 = 55mm diameter

15.7 cm ÷ 3.14 = 50mm diameter

14.1 cm ÷ 3.14 = 45mm diameter

12.5 cm ÷ 3.14 = 40mm diameter





And in imperial:7 inches ÷ 3.14 = 2.25 inches diameter

6.25 inches ÷ 3.14 = 2 inches diameter

5.5 inches ÷ 3.14 = 1.75 inches diameter

4.7 inches ÷ 3.14 = 1.5 inches diameter





It’s worth taking the measurement two or thee times to be absolutely sure, as cock rings usually cannot be exchanged after sale due to the intimate nature of their use.Another option is to visit your local “Do It Yourself” or hardware store and discover if you can find a ring with a diameter of 50 or 45 mm. This could be a curtain ring, a large rubber washer or something similar. Then when you get home put it on and see how it feels. Much too loose then you’ll need to buy a slightly smaller sized cock ring, too tight and you’ll need a larger cock ring.