The latest in male chastity design is the stylish V4 model. V4 is more compact, restrictive and more secure for an absolute discretion. V4 is made of Metal/Stainless Steel with 5 variations of tube for the perfect fit; Maxi, Standard, Small, Nano & Nub.

Nub: Length of tube (Base): 22mm (0.86 inch) Insider diameter: 34mm (1.34 inch)

Nano: Length of tube (Base): 30mm (1.18 inch) Insider diameter: 34mm (1.34 inch)

Small: Length of tube (Base): 40mm (1.57 inch) Insider diameter: 34mm (1.34 inch)

Standard Length of tube (Base): 50mm (1.96 inch) Insider diameter: 35mm (1.38 inch)

Maxi Length of tube (Base): 63mm (2.48 inch) Insider diameter: 35mm (1.38 inch)

How to measure for the perfect ring

If you know the circumference of your genital, refer to the chart below for recommended ring size. To find the circumference, place a string around the genital (behind the testicles and base of the shaft). The string should be snug but not tight cutting the blood circulation. We recommend that you measure only after a nice hot shower. Using simple math, divide your measurement with pi (3.142). 

Recommended chart for ring size

110 mm - 119 mm - Ø 36

120 mm - 132 mm - Ø 40

133 mm - 148 mm - Ø 45

149 mm - 163 mm - Ø 50

164 mm - 180 mm - Ø 55