KINK3D Cobra Base Ring

KINK3D base rings are worn around the penis and testicles (similar to a cock ring) and you add your COBRA or VIPER cage to it afterwards. Finally, you lock the cage with your favorite lock. (For a complete chastity device you need a cage, a base ring, and a lock.)
For most people, the ring should sit flush with your pubic area. If you're having trouble putting it on, we suggest inserting one testicle through at a time and inserting your penis last.

This is a standard ring: it is 8mm thick. These work for most people.

You can also choose 
1) XD Rings: they are thicker and extend forward by an extra 2.5mm. This tightens the ball gap, and also makes the rings more rigid. Good for people with smaller balls to prevent escape.
2) Curved Rings: 5mm backward curve at the bottom. Can be helpful for solving pressure under the scrotum or painful squeezing of the testicles. Note: This style increases the ball gap, making it much more likely to accidentally slip out.

We recommend starting with the Standard ring style, unless you already know from past experience that you need a different shape.

Size (inches/mm):

0: 1 1/2" - 38 mm
1: 1 5/8" - 41 mm
2: 1 3/4" - 44.5 mm
3: 1 7/8" - 47.5 mm
4:   2"    -  51 mm
5: 2 1/8" - 54 mm
6: 2 1/4" - 57 mm
7: 2 3/8" - 60 mm