Approx 5.5 inch diameter.
 
HOL-EE ROLLER JW Dog Toys have been designed to provide hours of fun. The novel, interactive toys will help keep dogs and puppies healthy and happy by providing endless opportunities for play. The Holl-ee-Roller is a malleable, natural rubber ball with hexagonal cut outs. The super stretchy ball can be stuffed with pig ears, rawhide or another toy. Ideal training and a sturdy toy!