2 Pack Flea Tick Control Adjustable Waterproof Collar Protect Dogs/Cats - Last 8 Months Natural Plant Extracts Pet Treatment Prevention Fits All M fits from neck to tail 14"- 16", Neck 15.25", Girth 20.5", 13-20 lbs FOOTBALL FANS Black and Silver Sizes: XS, S, M and L Easy on and off with Velcro