SPECIFICATIONS: Seat Size: 17.75"x14.75". Seat Height: 18.75"-23". Base Length: 39"-40" (Reg) (From outside-leg tip to outside-leg tip). Base Depth: 18.5"-20.5". Back Height from Floor: 32.5"-36.75". Max Tub Clearance: 18.5". Sliding Distance: 15". WEIGHT CAPACITY (400 lbs). Please measure your bathroom and tub carefully to make sure this item will fit your specific needs. This NON-RETURNABLE HYGIENE PRODUCT cannot be returned once opened. LONGER LENGTHS: #77682 (Long) & #77692 (Extra Long). OPTIONAL ARMREST: #75003 (Single)