"The protective inflatable collar is designed to protect pet's injuries, rashes, and post-surgery wounds located on the dog's body. It is designed to prevent pets from REACHING, biting, and licking their injured area or surgical site and helps promote recovery from surgery or wounds.The inflatable design and comfort soft fabric combined with the strap on the opening of the collar make this a versatile, comfortable and adjustable collar.Simply insert your dog's everyday collar through the inner ring loops for a secure and stable fit. This collar is an ideal support to your pet through the recovery phase post-surgery when a surgical collar is recommended. X-Small fits neck circumference up to 6"" Small fits from 6 to 10"" Medium fits from 10 to 13"" Large fits from 13 to 18"" X-Large fits 18"" and up"