Medium collar fits 15-20" neck and has a width of 3/4".
Cetacea chain martingale collars are one of your best choices for a quality training collar. Dog trainers and vets recommend this type of collar when a correction collar is needed. The webbing martingale version is for pet owners that do not want a chain version of the martingale collar. The martingale collar is fashioned after equine designs providing a form of a limited choke collar. The exceptional feature of a martingale collar is that the slip function can be limited to not over-choke your pet. To make the Cetacea martingale more practical than other brands it uses a quick release buckle so that the collar can be put on or removed from your dog’s head without having to readjust the length.
Cetacea collars are sewn using a unique Bar-tack stitch which is remarkably stronger and more durable than traditional "Box X" stitch used by other manufacturers. The hardware is made of brass as opposed to zinc while the quick release snap is made of high quality plastic.
Martingale collars are useful for narrow headed breeds or any dog who has a tendency to slip out of regular buckle collars. Properly fitted martingales are accepted by many venues for use in Rally Obedience trials.