BootySprout is a one size fits most. It can comfortably be used within the height range of 4'8"-6'5".
The height of BootySprout's foam back support is 14 inches, measured from the wood foot rest. This is an ideal height for hip thrusting. Most flat benches are 16-18 inches in height and are too high for most users when performing barbell hip thrusts.