Bed and furniture lifts. Also known as bed risers. Create an additional 5" of space under your bed with this set of 4 bed elevators. Put 1 under each leg for even elevation, or use just 2 risers to lift the bed's foot or head to accommodate medical conditions. Dimensions. Each piece measures 5-3/4" H. x 6-1/2" W. at the base. Fits up to 3" casters or posts. Color. Black. Made of high-impact plastic and designed to withstand up to 300 lb. each (for a total load of 1200 lb.). The risers lift the bed 5" off the floor. Set of 4.