The Core Belt provides stability for cardiovascular exercise and core strength. Features articulated foam for ergonomic fit. Stretch zones prevent belt from riding up. Easy-adjust, two-way buckle. Neoprene construction for a comfortable fit. Mesh zones accelerate drying. This belt is adjustable up to 55 inches. The foam portion is 24" long, 12.5" inches high at it's tallest, and 1.5" thick at it's thickest. Flotation belt provides stability for cardiovascular exercise and core strength. One size only.