Not Your Average Tennis Ball: Designed with an extra-thick natural rubber core covered with non abrasive felt, Chuckit! Tennis Balls for Dogs are gentler on your dog's mouth and are designed for the game of fetch Go Fetch Anywhere: This dog balls rubber core bouyance makes it perfect for water fetch and extra bouncy on dry land to encourage jumping. Bright orange and blue colors makes this dog ball easy to spot. Size Large fits all Large Chuckit! launchers Sizing matters: Size large measures 3" in diameter and is best suited for dogs weighing 60-100 lbs. The ball should be small enough for your dog to carry, but large enough that the ball can't completely fit in their mouth. When in doubt, buy a size up Make Fetch Happen: Chuckit! Performance toys are designed with you and your dog in mind; Try our full range of indoor and outdoor interactive dog toys including tumblers, flyers, fetch toys, other balls for dogs and more Chuckit! Fetch Pet Toys: Chuckit! makes indoor and outdoor dog toys that enrich the human-animal bond and helps dogs and puppies stay engaged. Try our full line of ball launchers, puppy toys, flying discs, tennis balls for dogs, dog chew toys, and more