Sizes: Small, Medium, Large, XL and XXL Notes: Please use a tape to measure around your dogs muzzlee according to the size information in the picture. If any of the measurements are 'between' two sizes, choose the larger size. If you are not satisfied with our goods or choose the wrong size, please write to us immediately so that we will try our best to give you the best service. The size informaiton following: S(Length:4.92-5.7inch;Deep:1.77-2.36inch;Spout:1.77-2.56inch; Cheek:2.56-3.15inch); M(Length:5.9-7.08inch;Deep:1.97-2.56inch;Spout:2.36-3.15inch; Cheek:3.15-3.93inch); L(Length:6.1-7.48inch;Deep:2.16-3.15inch;Spout:3.45-3.94inch; Cheek:3.94-4.72inch); XL(Length:7.28-8.66inch;Deep:2.36-3.74inch;Spout:3.54-4.53inch; Cheek:4.13-5.12inch); L(Length:7.87-9.45inch;Deep:2.56-3.94inch;Spout:4.53-5.31inch; Cheek:5.9-6.69inch); Package Included: 1X Dog Muzzle