What Size & Weight Are Tennis Balls? - Basha Tennis
Tennis Ball Size & Information Guide | Net World Sports
Pet Supplies : Snug Rubber Dog Balls for Small and Medium Dogs - Tennis Ball Size - Virtually Indestructible (3 Pack - Blue) : Amazon.com
Pet Supplies : WookYumy 12 Pack Mini Tennis Balls for Pet Playing Fecth, 2 inch Dog Training Tennis Balls for Small Size Dogs, Interactive Dog Playing Balls Fits 2 inch Dog Ball Launchers : Amazon.com
Hyper Pet Mini Tennis Balls - Choose 1.75-inch or 2.5-inch Size (Pack of 4) | eBay
Tennis Ball Size and Bounce Test
Medium Blue Furniture Balls (Racquetball Size) - 200 Count – FloorBuddies.com