M-PETS Soft Muzzle. The Soft Muzzle prevents biting, barking & chewing and keeps aggressive dogs under control. It is perfect for visits to the groomer or to the vet. The muzzle should have a snug or a loose fit, but not tight. Generally, a snug fit prevents aggression and biting, and a loose fit prevents chewing, barking etc. Fully adjustable with a hook and loop chin strap for a sleek, custom fit Lockable buckle for once you have your perfect fit Comfortable & adjustable polyester webbing & neoprene Available Sizes (Measurements are Approximate): Small Band Width: 4.5 cm Snout: 13 - 17 cm Neck: 19 - 48 cm Medium Band Width: 4.8 cm Snout: 15 - 23 cm Neck: 24- 50 cm Large Band Width: 5 cm Snout: 20- 28 cm Neck: 27- 77 cm X-Large Band Width: 5 cm Snout: 20 - 30 cm Neck: 26 - 79 cm