Make Your Sweet Puppy Look Like The Dangerous Creature Hethinks He Is With This Shark Costume. This Adorable Dogcostume Features A Polyester Shark Dorsal Fin Attached To Anelastic Band With Velcro Clasps That Fits Around Your Dog'Stummy. A Smaller Band Connects To The Dog'S Collar To Holdthe Fin In Place. For Dogs Weighing 14-23 Lbs.Pet Medium Fits Neck Sizes 11-14 In, Chest 16-19 In, Backlength 13-15In.