Total height from the floor to the top of the back: 18 inches Height from floor to top of seat or height of seat: 6 1/2 inches Height from top of seat to top of back: 11-1/2 inches Front of the seat is 13-1/2 inches wide Middle of the seat is 12-1/2 inches wide Back of the seat 11 inches wide. (pottytrainingconcepts.com)