Puppy Bumpers - Keep Your Dog on the Safe Side of the Fence - Mint Chocolate Chip - 10'' to 13'' Dog's collar threads through loops to stay secure Light, comfortable, machine washable. Never fear for Fido's safety near a fence again! Measure your dog's neck to ensure correct sizing This collar for dogs with necks 10 to 13 inches. Usually 9 to 13 lbs. approx.