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.

Neck: Measure the circumference of pet’s neck for a snug fit. No need to add inches as you would with a collar.

Chest/Girth: Measure girth around the broadest part of the chest and add 2”.

Note:  If the dog has a stout build, select one size larger.

Recommended sizing by breed:

XX-Small: Teacup and dogs under 5 lbs

X-Small: Australian Terrier, Chihuahua, Pomeranian, Toy Poodle, Yorkshire Terrier

Small: Boston Terrier, Jack Russell Terrier, Maltese, Pug, Silky Terrier

Medium: Bichon Frise, Beagle, Cocker Spaniel, Corgi, Scottish Terrier

Large: Brittany Spaniel, Bulldog, Collie, Schnauzer, Springer Spaniel

X-Large: Doberman Pinscher, German Shepherd, Golden Retriever, Labrador Retriever, Rottweiler

XX-Large: Irish Wolfhound, Great Dane, Mastiff, Newfoundland, St. Bernard

Size            Fits Length    Fits Necks     Fits Chests
X-Small       Up to 8"        10" - 16"      17" - 22"
Small           8" - 12"        12" - 18"      22" - 26"
Medium       12" - 16"       14" - 21"      26" - 30"
Large          16" - 20"        16" - 23"     30" - 34"
X-Large       20" - 24"        18" - 24"     34" - 38"
XX-Large     24" - 30"        18" - 24"     38" - 44"