The size adjusts with three lockable buckles on each side. There are four D-rings attached to the front and the back, which can serve as points of attachment for rope/cuffs/etc., creating many bondage possibilities.

Measurements:
Extra Small-Small: Waist 24” to 28”
Medium-Large: Waist 28” to 32”
Extra Large-XX Large: Waist 32” to 36”