The all natural nature ball is made of sisal and has a fun playtime bell inside. Small pets will nibble nudge toss and roll and safe for chew-n-fun all rolled into one. Toys encourage healthy playtime activity and help prevent cage boredom for rabbits and other small pets. Available in medium size. Measures 3-3/4-inch width by 3-3/4-inch depth by 3-3/4-inch height.