Platform is 36″ x 13″. Adjusts to three different heights (6″, 8″ and 10″). Perfectly designed for low weight dumbbell step-ups, step aerobics and low impact plyometric drills. Slip resistance surface.Please Note: This item CANNOT ship to P.O. Boxes, APO, or FPO Addresses. It CAN ONLY ship to a Street Address.