This is another quality product from YOGIBO with a variety of sensory applications. The dimensions are 17" diameter and 8" in height. The microbead filling quarantees the cushion will never go flat! This product can provide sensory input when used as a cushion seat, aiding in the ability to focus on a task. It can also be used for neck support, footrest, or as a pillow for fulfilling the ultimate "need to squeeze". It comes with a removable zippered cover for easy washing/drying.