Neck 13"-16.9", Width 1", Size M; The collar does not stretch itself, please make sure leave ONLY 2 fingers between collar and dog neck. A properly fitting collar and harness won't leave any room for your dog to chew The collar is not for tie out. NEVER leave your dog unattended with a collar on Made out of stylish 100% genuine leather, it is very soft and flexible. The inside of collar is softly padded and protects your dogs neck from rubbing and irritation. Our dogs will be very comfortable in it. Great for training, running, walking. Heavy duty large brass D ring on top of the dog collar for an easy leash attachment or ID Tags. The brass hardware will not rust like other cheap dog collars. Superior hand stitching using the strongest threads available. For whatever reason, if you don't absolutely love our padded leather collar, just return it, we'll refund .(Or replace it, if there is a problem)