The Lock Up Nub Base Ring Diameter:55 mm There are three different size

There are three different size ring diameters to choose from

Pink/Black

Flexible Fit

this harness set offers an unmatched combination of comfort and durability

The Lock Up Nub Base Ring Diameter:55 mm There are three different sizeDiscover precision control in a compact profile. The Lock Up Nub Metal Chastity Device is crafted from premium stainless steel for a secure, long wear fit with a sleek, discreet look under clothing. Its full encasement design and integrated lock deliver reliable restraint, while three interchangeable rings help you dial in the perfect size. Water resistant and easy to maintain, its built for daily wear and consensual power play. Highlights Premium