When trying to decide between two sizes, choose the larger size for a better fit.

SizeChest*Neck*Breed Examples
Extra Small127Teacup and Puppies under 5 lbs
Small1411 Chihuahua, Pomeranian, Australian Terrier, Yorkshire Terrier, Toy Poodle
Medium1725Pug, Maltese, Jack Russeli Terrier, French Bulldog, Boston Terrier
Large2022 Bichon Frise, Beagle, Cocker Spaniel, Corgi, Scottish Terrier
Extra Large2428 Springer Spaniel, Brittany Spaniel, Collie, Bulldog, Schnauzer
2X Large3236 Doberman Pinscher, Golden Retriever, Labrador Retriever, Pit Bull
* in inches
Pet's Costume Sizing Chart Diagram