This listing is for a set of 4 Rainbow Puffs Ball Cat Toys. Cats love these balls, because they're soft and brightly colored! My girls love chasing them around the house, and bouncing on top of them! Kittens can easily carry them around too! NOTE: These puff balls are hollow, so they can only be herbal infused, and bells will be tied to the outside of the ball only. SIZING: Each ball is about 1.25 inches in diameter. OPTIONS: Potent Catnip Blend of Catnip, Silvervine & Valerian Jingle Bell *** We only use fresh USA certified organic Catnip Herbs. Our herbal sprays are all cat-safe water-based Hydrosols, because essential oils can be highly toxic to cats.