Our Potty training toilet ladder fits standard height toilets which ranging in height from 14" to 16.5" from floor to toilet bowl seat. Universally applicable for 99% standard-sized toilets like V shape, U shape, O shape(NOT for Square). Does NOT fit high toilets which over 16.5" high, such as Comfort Height and ADA Compliant Height toilets. Our potty trainer is made of high quality PP, can hold up to 75kg(165lb), sturdy enough when your toddler climbs up/down. padding on the potty seat makes it comfortable. Our potty training seat is suitable for 1-8 years old, as the footrest is adjustable(2 choice of height) so you can continue to use it when kids grow up. These toilet trainer ladder is both suitable for boys and girls with pee catcher design, makes her or him super interested in potty time. It s very easy to assemble and storage. Can be folded compactly behind the door when not use, save your bathroom more space.