Sportime Yellow Inflatable All-Ball measures 4 in and has a high-tactile surface, which is easy to hold and catch. It is made with our seam-free rotational molding process, and includes a standard athletic valve to adjust the size, bounce and resistance. It is used for juggling, paddleball activities, Fling-It, baseball, softball, hand squeeze exercising and more. Sold in a pack of 12.