How to Measure a Dog for a Coat | Pawé Lab

July 31, 2026

Finding a dog coat that looks beautiful is easy. Finding one that fits properly takes a little more care.

A well-fitting dog coat should protect your dog from wind and rain without restricting movement, rubbing under the legs or shifting during a walk. Because dogs of the same breed can have very different proportions, choosing a size based on breed or weight alone can often lead to the wrong fit.

The most reliable approach is to measure your dog’s back length, chest girth and neck circumference before ordering.

In this guide, we explain how to measure your dog for a coat or rain jacket, how to check the fit and what to do when your dog falls between sizes.

What You’ll Need

Before you begin, prepare:

A soft measuring tape
Your dog’s usual collar
A pen or phone to record the measurements
A few treats to help your dog stand calmly

Measure your dog while they are standing naturally on all four paws. Measurements taken while your dog is sitting, lying down or curling their body may not be accurate.

If your dog has a long or particularly fluffy coat, keep the measuring tape close to the body without pulling it tightly.

The Three Essential Dog Coat Measurements

Although sizing systems vary between brands, most dog coats require three basic measurements.

1. Back Length

Back length is generally the most important measurement when choosing a dog coat.

Place one end of the measuring tape at the base of your dog’s neck, where the collar naturally sits and the neck meets the shoulders. Run the tape along the spine to the base of the tail.

Do not measure from the top of the head or all the way down the tail.

The coat should cover most of your dog’s back without extending so far that it interferes with the tail or toilet breaks.

How to measure:

Ask your dog to stand straight.
Locate the base of the neck between the shoulder blades.
Measure along the spine to the point where the tail begins.
Record the measurement in centimetres.

2. Chest Girth

Chest girth is the circumference around the widest part of your dog’s ribcage. This is usually located just behind the front legs.

Wrap the measuring tape around the chest, making sure it sits flat and is not twisted. It should be snug but not tight.

For a comfortable fit, you should generally be able to slide one or two fingers between the tape and your dog’s body.

Chest girth is especially important for broad-chested breeds, deep-chested dogs and dogs with athletic body shapes.

3. Neck Circumference

Measure around the lower part of your dog’s neck where the collar normally rests.

Avoid measuring too high near the head, as this area is often narrower than the part of the neck that sits inside a coat.

The neckline should be secure enough to prevent the coat from sliding backwards but loose enough to avoid pressure on the throat.

Why Weight Alone Is Not Enough

Dog weight can be a useful reference, but it should not be used as the only factor when selecting a coat size.

Two dogs weighing 10 kilograms may have completely different body shapes. One might have a broad chest and short back, while the other has a narrow chest and long body.

This is particularly common among breeds such as:

Dachshunds
French Bulldogs
Greyhounds
Whippets
Pugs
Staffies
Cavoodles
Italian Greyhounds

Always compare your dog’s actual measurements with the product-specific size chart. Breed and weight recommendations should be treated as a general starting point only.

What If Your Dog Is Between Sizes?

If your dog’s measurements fall between two sizes, begin with the chest measurement.

A coat that is slightly longer or shorter may still be wearable, but a coat that is too tight around the chest can restrict movement and cause discomfort.

In most cases, choosing the larger size is safer when:

Your dog has a broad or deep chest
Your dog has a thick or fluffy coat
Your dog is still growing
The smaller size is close to the maximum chest measurement
You want space for a harness or light layer underneath

However, sizing up too far may cause the coat to rotate, flap in the wind or create gaps that allow rain to enter.

Adjustable neck, chest and body features can help create a more secure fit for dogs whose proportions fall between standard sizes.

How Should a Dog Coat Fit?

Once the coat is on, allow your dog to walk around indoors for a few minutes.

A properly fitted dog coat should:

Sit comfortably around the neck
Cover the back without pressing against the tail
Allow the front and back legs to move freely
Stay centred while your dog walks
Avoid rubbing under the front legs
Leave enough room for normal breathing
Allow your dog to sit, lie down and toilet comfortably
Feel secure without being restrictive

Watch your dog’s body language. Scratching at the coat, freezing, walking stiffly or repeatedly trying to remove it may indicate discomfort or an unfamiliar sensation.

Introduce new clothing gradually, using treats and positive reinforcement.

Signs a Dog Coat Is Too Small

A dog coat may be too small if:

The fabric pulls tightly across the chest or shoulders
The straps leave marks on the body
The neckline presses against the throat
Your dog cannot extend their front legs normally
The coat rides forward or backwards
Fasteners are difficult to close
Your dog appears uncomfortable or reluctant to move

Do not rely on the belief that a tight coat will stretch with use unless the product description specifically identifies the fabric as stretchable.

Signs a Dog Coat Is Too Large

A coat may be too large if:

It slides from side to side
The neckline creates a large opening
The belly panel hangs too low
Your dog steps on the coat or straps
The back extends significantly beyond the base of the tail
The coat twists during walking
Loose sections may catch on branches or other objects

An oversized raincoat may also allow water to enter around the neck and chest, reducing its effectiveness.

Common Measuring Mistakes

For the most accurate result, avoid these common mistakes:

Measuring While Your Dog Is Sitting. Sitting changes the shape and length of the body. Always measure while your dog is standing naturally.
Pulling the Tape Too Tightly. The tape should follow the body without compressing the fur or skin.
Measuring the Entire Tail. Back length finishes at the base of the tail, not the tip.
Choosing by Breed Alone. Breed recommendations cannot account for every dog’s individual shape.
Using an Old Measurement. Puppies grow quickly, and adult dogs can change size after grooming, weight changes or changes in muscle condition. Measure again before purchasing a new coat.