Dog Cooling Jacket Size by Breed | Chillybuddy Size Guide

This quick Chillybuddy™ breed guide helps you find a likely jacket size based on common breed averages and customer fit history. It's a helpful shortcut when you need a fast answer—or when the lucky dog is a surprise and you cannot measure them yourself.

For the most confident fit, we always recommend measuring your dog's neck, back, and chest girth before ordering. Dogs within the same breed can vary in build, coat thickness, chest shape, and back length.

Gift buyer shortcut
Use this breed guide for a helpful first estimate. Use measurements whenever possible to confirm the best Chillybuddy fit.

Find a likely size by breed

The chart below lists popular breeds and common customer fit examples to help you narrow down a likely Chillybuddy size at a glance.

It's especially useful for gift buyers, new dog parents, or anyone who does not have access to the dog right now. If you are shopping for your own dog, have a measuring tape handy, or know the dog has an unusual body shape, use the breed guide as your starting point—then confirm with measurements.

Important: Breed recommendations are helpful estimates, not guarantees. For the best fit, compare your dog's neck, back, and chest-girth measurements with the size chart. This is especially true for mixed breeds, growing dogs, barrel-chested breeds, deep-chested breeds, thick-coated dogs, or dogs near a size boundary.

Chillybuddy size	Neck circumference	Back length	Chest girth	Common breed fit examples
Petite	11–15 in	13 in	16–20 in	Chihuahua, Yorkshire Terrier, Toy Poodle, Maltese, Papillon, Pomeranian, Brussels Griffon, Toy Fox Terrier
X-Small	12–15 in	16 in	18–22 in	Miniature Dachshund, Shih Tzu, Havanese, Bichon Frise, Miniature Pinscher, Italian Greyhound, small Jack Russell Terriers
Small	15–18 in	19 in	18–22 in	Cavalier King Charles Spaniel, Pug, Boston Terrier, Miniature Schnauzer, West Highland White Terrier, Scottish Terrier, 13-inch Beagle, Lhasa Apso
Medium	17–20 in	21 in	22–29 in	15-inch Beagle, Cocker Spaniel, French Bulldog, Pembroke Welsh Corgi, Shetland Sheepdog, Whippet, Cavalier mixes, and similar mid-size mixed breeds
Large 24	21–25 in	24 in	24–31 in	Border Collie, Australian Shepherd, English Springer Spaniel, Standard Schnauzer, smaller Vizslas, English Bulldog, Brittany
Large 27	21–25 in	27 in	24–31 in	Labrador Retriever, Golden Retriever, Boxer, Dalmatian, German Shorthaired Pointer, Standard Poodle, larger Vizslas
X-Large	26–29 in	31 in	26–34 in	German Shepherd, Doberman Pinscher, Weimaraner, Greyhound, Rhodesian Ridgeback, leaner Alaskan Malamute

Last updated: August 2026

Why these breeds are listed: They are popular breeds and common customer fit examples. This is not a complete list, nor is it a guarantee. Dogs of the same breed can differ significantly, so use measurements whenever possible.

Large 24 vs. Large 27

Both Large sizes fit the same neck and chest-girth ranges. The difference is back length:

Choose Large 24 for dogs with a 24-inch back or a shorter large-dog build.
Choose Large 27 for longer-backed dogs with a 27-inch back, including many Labs, Goldens, Boxers, Standard Poodles, and German Shorthaired Pointers.

When neck and girth fit both Large options, back length is the deciding measurement.

Buying Chillybuddy as a gift?

You can still make a thoughtful, informed choice without a measuring tape.

Start with the dog’s breed or closest breed mix in the chart above. That recommendation is your best quick estimate, particularly for a popular breed with an average build.

If you know the dog is especially tall, long-backed, broad-chested, heavily coated, or larger than average, consider the larger option. If possible, ask the recipient for their dog’s neck, back, and chest-girth measurements before ordering.

If you know the size of a harness, coat, or jacket that already fits, that can be useful context for fit support—but dog-apparel sizing varies by brand, so it is not a direct size match.

How to measure your dog

For the most accurate Chillybuddy fit, measure your dog while they are standing naturally on a level surface. A soft tailor’s tape works best. No tape? Use a piece of string, then measure the string against a ruler or tape measure.

Measure the Neck
Measure around the base of the neck, where your dog's collar naturally sits. Keep the measuring tape comfortably snug. Make sure it's not tight.
Measure the Back Length
Measure from the base of the neck to the base of the tail. Back length helps determine whether your dog needs Petite, X-Small, Small, Medium, Large 24, Large 27, X-Large, or XX-Large.
Measure the Chest Girth
Measure around the widest part of your dog's chest, usually just behind the front legs.

Chest girth is especially important for broad-chested, barrel-chested, or deep-chested dogs.

Compare all three measurements

Use the size chart to compare neck, back, and chest girth together. A comfortable jacket should allow natural walking, turning, sitting, and panting without pinching, rubbing, restricting movement, or shifting excessively.

Between sizes? Choose the larger size. This is particularly helpful for dogs with thick coats, broader chests, extra body condition, or measurements near the upper end of a range.

Dog breed fit notes

French Bulldogs and Corgis

French Bulldogs and Pembroke Welsh Corgis often fall in the Medium range, but their shapes can differ substantially. Frenchies are often broad through the chest, while Corgis are commonly longer through the back.

Start with Medium, then confirm chest girth and back length before ordering.

Greyhounds, Whippets, and deep-chested dogs

Deep-chested dogs can have a chest measurement that suggests sizing up and a neck measurement that suggests a smaller size. Greyhounds and Whippets are especially important to measure individually.

Prioritize having enough chest room.

Mixed breeds, fluffy coats, and dogs between sizes

For mixed breeds, actual measurements are more useful than visual resemblance to a listed breed. Heavily coated dogs, dogs carrying extra weight, and dogs on a size boundary may need the larger option for a more comfortable fit.

Frequently asked questions

Yes. This breed guide provides a helpful quick estimate based on common breed averages and customer fit patterns. It is especially useful for gift buyers or when you cannot measure the dog. For the most accurate fit, confirm with neck, back, and chest-girth measurements whenever possible.

No. It is a useful starting point, but not a guarantee. Dogs of the same breed can vary in body shape, chest width, back length, coat thickness, and body condition. Measurements are the best way to confirm fit.

Yes. Find the breed in the chart and use the listed size as your best estimate. If the dog is known to be especially large, long-backed, broad-chested, heavily coated, or close to a typical size boundary, consider the larger option or ask the recipient for measurements if possible.

Choose the larger size for a more comfortable cooling-jacket fit. This is particularly useful for dogs with thick coats, broad chests, extra body condition, or measurements at the upper end of a range.

Use the breed chart only as a general body-type reference. For the best fit, measure neck, back, and chest girth, then compare all three measurements with the chart.

Both sizes use the same neck and chest-girth range. The difference is back length: Large 24 has a 24-inch back, while Large 27 has a 27-inch back. Choose based on your dog’s back measurement.

Do not guess. Prioritize a comfortable chest fit, compare all three measurements, and contact Chillybuddy for fit help before ordering. Include your dog’s breed or mix, neck, back, and chest-girth measurements, plus a standing side-view photo if available.