Salli Swing Saddle Seat Patented split-seat saddle design cools and relieves pressures for improved genital health in both women and men. Heavy duty 3mm steel seat plate covered with high quality contouring foam and your choice of available leather or synthetic upholstery. Large 65mm casters for easy maneuverability. Choose hard-tread casters for carpet, or soft-tread casters for hard floors. Medium fits 5'1" to 6'1" (Seat height 22.5"-30"). Other sizes also available: Short (Fits 4' to 5'2" - Seat height 18.5"-23"); Tall (Fits 5'8" and over - Seat height 25"-35"). Body height recommendations are approximate and vary with body proportion, height of shoes, riding style, etc. Ten (10) year warranty.