This harness is fully adjustable thanks to the buckles on the hips and on the crotch. It has two straps on the back adjustable in 4 positions. It is adjustable from a size S (80 cm) to an L (100 cm). It has 6 holes in the belt to adjust the size. The O-ring is perfect for placing a less than 45mm dildo (not included). Try the suction cup R9147 and the dildos R9136, R9137, R9138, R9139 and R9140.