Dog Cone After Surgery, Protective Inflatable Collar, Blow Up Dog Collar, Pet Recovery Collar for Dogs and Cats SoftM, Blue) Size: M: 27X27CM Neck Diameter: 7-8CM Neck Circumference: 25-33CM (The suggested size is just a suggestion because every dog is different.) COMFORTABLE: The inflatable collar is soft and won't block your pet's vision, they can eat, drink, sleep and play normally Anti-scratch and anti-bite: The inflatable collar is a great way to protect your pet from injuries, rashes and post-surgical wounds. It prevents pets from biting and licking injured or surgical sites and promotes recovery from surgery or wounds EASY TO STORAGE: The inflatable recycling design lets you deflate so you can store it in tight spaces when not in use ADJUSTABLE: The collar has an inner loop that can be adjusted to your pet's size using the straps. DURABLE AND STABLE: The premium protective collar is soft and washable, won't leave marks or scratch furniture, you can insert your pet's daily collar into the inner ring for stability. Measurement differences may exist.