Waist straps are a fan favorite in the chastity world! The KINK3D Strap Ring with integrated loops is designed specially for a waist strap. Some people find that when their chastity cage is worn unsupported, it can hang down away from the body. Wearing a strap can help the cage sit in a cozier position, enhancing the overall snugness and stability of your setup. This reduces the chance of ball slips while minimizing the temptation to pull out. Included This product includes a Strap Ring only. The two loops are approximately 28mm x 8mm (1.1" x 0.3"). They've been vetted to work with straps including: Mr. S Leather X KINK3D Neoprene Waist Straps Chastity Straps and Chastity Harnesses by Lustful Lavish Sizing Standard Rings: 8mm thick. These work for most people. XD Rings: 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. Curved Rings: 5mm backward curve at the bottom. Can be helpful for solving pressure under the scrotum or painful squeezing of the testicles. Note: Curved Rings increase the ball gap, making it much more likely to accidentally slip out. Only get a Curved ring if you really need it. We recommend starting with the Standard ring style, unless you already know from past experience that you need a different shape. Unsure about size? Click here to review our size guide. Size 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 Gap Specs Gap specs for each Cobra and Viper cage size can be found here. Compatibility KINK3D Strap Rings are compatible with: all KINK3D Cobra® cages all KINK3D Viper® cages all KINK3D Shaft Rings