Back: Measure length of pet’s back from the base of the neck to the base of the tail. See below for estimating by breed. Note: If the dog has a stout build, select one size larger.

Recommended sizing by breed:

Teacup: Dogs under 5 lbs

XX-Small: Chihuahua, Chinese Crested, Pomeranian, Toy Poodle

X-Small: Brussels Griffon, English Toy Spaniel, Maltese, Miniature Dachshund, Norfolk Terrier, Papillon, Yorkshire Terrier

Small: Austrialian Terrier, Border Terrier, Boston Terrier, French Bulldog, Miniature Pinscher, Miniature Poodle, Pekingnese, Pug, Shih Tzu, Silky Terrier, West Highland Terrier

Medium: Beagle, Bichon Frise, Brittany Spaniel, Cairn Terrier, Cocker Spaniel, Corgi, Jack Russell Terrier, Lhasa Apso, Scottish Terrier

Large: Australian Shepherd, Border Collie, Bulldog, Dalmatian, Standard Schnauzer