Standard Rings: 8mm thick. These work for most people.

XD Rings: Extend forward by an extra 2.5mm. This tightens the gap, and also makes the rings more rigid. Good for people with smaller balls to prevent escape.

Curved Rings: 5mm backward curve at the bottom. Good for troubleshooting pressure under the scrotum. Please note that people with smaller balls can be more likely to slip through the gap.

Unsure about your size? Check out the Sizing Guide

Size chart inches mm
0 1 1/2 38.1
1 1 5/8 41.3
2 1 3/4 44.5
3 1 7/8 47.6
4 2 50.8
5 2 1/8 54
6 2 1/4 57.2
7 2 3/8 60.3

Cage and lock are sold separately!