? Size: 3.3X3.3 Inch?? Internal increase: 2.75 Inch?? Total height: 3.9Inch? Adds additional height/storage space under beds and furniture making cleaning underneath furniture easier (great for robot vacuums) Lifts bedroom, living room, and home office furniture to a more ergonomically correct height that provides a safer biomechanical advantage to user Solid wood stitching, a set of four Raises beds, couches, armchairs, desks, sofas, and other stationary furniture height 3.14 inches to assist sit to stand process and boost ergonomics