Made as a multi-function harness, this will quickly become one of your favorite bedroom accessories. Harness has O-Ring, three different sizes included, in front that can be easily replaced to accommodate your favorite dildo. On the reverse side there is a slot where you can place a bullet vibe, allowing vibrating sensations to flow through the dildo and simultaneously stimulating the wearer. Three ring sizes included are: 1.25 inch diameter, 1.5 inch diameter and 1.75 inch diameter. To change rings, simply unsnap leather straps hold ring and replace with new ring. Sizing: , Small/Medium: Fits 27-36 inch waists. , Large/Extra Large: Fits 37-47 inch waists. Note: Dildo and Bullet Vibe Sold Separately.