Product Dimensions: 40 cm length x 27 cm width x 110 cm height Relieve shoulder stiffness by loosening the shoulder blades! Supervised by a shoulder blade specialist chiropractor Replicates the techniques of a chiropractor, swaying back and forth to apply pressure to the back and shoulder blades, which are difficult to loosen on your own. Features 18 protrusions to apply pressure to the shoulder blades and surrounding muscles, and a specially designed curved shape to support the back. Swaying from side to side, it powerfully loosens even the hard-to-reach shoulder blades※ by applying your body weight.