A Very strong muzzle with a pre-moulded shape for fast & easyfixing.muzzle Size Dogs Noseband (inch)1&2 Yorkies 7.54 whippets 9.56 Border Collies 118 Labradors 1210 Labradors 1312 Labradors 14.514 Great Danes 15 These straps are adjustable so it leaves a little room for flexibility.