Fit first
Pet costume size guide
Breed names are a guess — a tape measure is not. Three measurements get you the right size the first time.
How to measure
- 1
Neck
Wrap a soft tape where the collar naturally sits. Leave two fingers of slack.
- 2
Chest (girth)
Measure the widest point just behind the front legs. This is the most important number — always size up if you're between sizes.
- 3
Back length
From the base of the neck to the base of the tail, with your pet standing.
| Size | Neck | Chest | Back length | Typical fit |
|---|---|---|---|---|
| XS | 8-10" | 12-14" | 8-10" | Chihuahua, kitten-size pup |
| S | 10-12" | 14-17" | 10-13" | Dachshund, Pug, Yorkie |
| M | 12-15" | 17-21" | 13-16" | Beagle, Shiba Inu, Corgi |
| L | 15-18" | 21-26" | 16-20" | Border Collie, Cocker Spaniel |
| XL | 18-22" | 26-32" | 20-25" | Golden Retriever, Labrador |
| Size | Neck | Chest | Back length | Typical fit |
|---|---|---|---|---|
| S | 8-9" | 11-13" | 9-11" | Kittens, petite adults |
| M | 9-11" | 13-16" | 11-14" | Most adult cats |
| L | 11-13" | 16-19" | 14-17" | Maine Coon, larger breeds |
Still unsure?
Send us your pet's chest and neck measurements and we'll pick the size for you. Deep-chested breeds (Greyhounds, Dachshunds) should size by chest, then check back length.