This Item Is Aqua Paws Small 11"-15" Order Other Sizes Below ------- Use Chart For Size Breed Size ----------------------------------------------Chest Girth Toy Poodle, Yorkie Small--------------------------------11 - 15 Inches Beagle, Jack Russell Medium -------------------------15 - 19 Inches Pug, Boston Terrier Large-------------------------------19 - 23 Inches Cocker Spaniel, Medium Collie Xl-------------------23 - 27 Inches Boxer, Doberman, English Bulldog Xxl-------------27 - 31 Inches Lab, Rottweiller Xxxl-------------------------------------31 - 35 Inches Note: If Your Dog Is Within 1 Inch Of The Size Range, We Recommend Ordering The Next Size Up. This Will Give Your Dog More Coverage & Better Protection.