To measure your dog for a coat, ask them to stand naturally and use a soft measuring tape to record three measurements: back length, chest girth and neck circumference. Measure twice, write the numbers in centimetres and compare them with the size chart for the exact coat you want to buy. Dog-clothing sizes are not standard, so never choose by breed, weight or a familiar size label alone.
A dog coat can look attractive and still fit badly. A garment that is too tight may restrict the shoulders or rub behind the front legs, while one that is too long can interfere with the tail or toileting. A few careful measurements before ordering can reduce guesswork and help your dog move comfortably.
If you are still deciding whether an extra layer is necessary, read does your dog need a coat in autumn? before choosing a style.
What you need before measuring your dog
Prepare everything first so the process is calm and quick:
- A flexible tailor’s measuring tape
- A note on your phone or a piece of paper
- A few small treats or another suitable reward
- A level, non-slip floor
- A second person, if your dog finds it difficult to stand still
If you do not have a flexible tape, use a non-stretch piece of string, mark the measurement and then place it against a ruler. Avoid a rigid metal tape near your dog, and do not use elastic cord because it can stretch and alter the result.
Measure when your dog is calm. Let them see and sniff the tape first if it is unfamiliar. If they appear worried, pause and try again later rather than holding them in position. Accurate measurements are easier to obtain from a relaxed dog.
The three essential dog-coat measurements
| Measurement | Where to measure | Why it matters |
|---|---|---|
| Back length | From the base of the neck to the base of the tail | Helps determine body coverage without obstructing the tail |
| Chest girth | Around the widest or deepest part of the ribcage, usually behind the front legs | Helps ensure the coat closes comfortably and allows breathing and movement |
| Neck circumference | Around the base of the neck where the coat’s neckline will sit | Helps prevent a neckline that is too tight or so loose that it shifts |
Some products request additional measurements, such as belly length, waist girth or leg length. Use the manufacturer’s diagram because measuring points can vary with the garment’s design.
How to measure your dog for a coat step by step
1. Position your dog naturally
Ask your dog to stand squarely on all four paws with the head in a relaxed, neutral position. The back should not be curved because the dog is sitting, stretching towards a treat or lowering its head to the floor.
Standing measurements are normally more reliable for clothing than measurements taken while sitting or lying down. Place treats at your dog’s natural head height rather than holding them high above the nose.
2. Measure the back length
Find the base of the neck—the point where the neck meets the shoulders and where a coat would normally begin. Run the tape along the spine to the base of the tail, where the tail joins the body.
- Keep the tape flat along the back without following it down the tail.
- Do not start from the top of the head or from the front edge of the collar.
- Do not add extra centimetres unless the product instructions specifically tell you to.
- Record the result as your dog’s back length, not the desired garment length.
Back coverage varies by design. A raincoat may extend towards the tail, while a jumper or fashion layer may finish sooner. Always compare your body measurement with the diagram supplied for that particular item.
3. Measure the chest girth
Wrap the tape around the widest or deepest part of your dog’s ribcage. This is often a short distance behind the front legs, but the exact widest point depends on the dog’s build.
- Keep the tape level around the body rather than letting it slope.
- Rest it against the fur without compressing the chest or pulling thick fur unnaturally tight.
- Check that your dog is breathing normally and not leaning or twisting.
- Repeat the measurement and use a consistent result.
Chest girth is frequently the limiting measurement because the coat must fasten around the body while allowing natural breathing and shoulder movement. However, follow the sizing priority stated on the individual product chart rather than assuming chest always decides the size.
4. Measure the neck circumference
Measure around the base of the neck where the coat neckline will sit. This point is usually lower than the position of a narrow everyday collar.
Keep the tape close to the fur without pulling it tight. The finished garment needs suitable ease, but the amount of allowance depends on the coat’s neckline, fastening and fabric. Record the dog’s actual measurement and let the product chart provide the intended allowance.
5. Repeat and record in centimetres
Measure each area at least twice. If the numbers differ, reposition your dog and take the measurement again rather than averaging two unreliable results.
Many UK dog-clothing charts use centimetres, while some brands show inches as well. Record both only if needed, and avoid converting repeatedly because rounding can create small errors. For reference, one inch equals 2.54 centimetres.
Dog-coat measurement record
Save your dog’s measurements in this format. Add the date because puppies grow and adult dogs can change shape or coat thickness.
| Measurement | First check | Second check | Final measurement |
|---|---|---|---|
| Back length | _____ cm | _____ cm | _____ cm |
| Chest girth | _____ cm | _____ cm | _____ cm |
| Neck circumference | _____ cm | _____ cm | _____ cm |
| Date measured | ____________________________ | ||
How to use a dog-coat size chart correctly
Do not carry a size label from one product to another. A medium in one dog coat may have completely different measurements from a medium in another. Even products from the same retailer may use different supplier patterns.
- Open the size chart on the exact product page.
- Check whether the figures describe the dog’s body or the garment itself.
- Compare all requested measurements—not only back length.
- Read any note explaining which measurement has priority.
- Check whether the design is adjustable at the neck, chest or belly.
- Review the returns or exchange policy before removing labels.
Breed suggestions can be useful examples, but dogs of the same breed can differ in chest depth, back length, weight and coat thickness. Treat breed and weight recommendations as secondary guidance after actual measurements.
What if your dog is between two coat sizes?
Do not automatically choose the larger size. First check which measurement controls the fit for that design. For a coat that fastens around the ribcage, chest room may be the priority. For a long-backed dog, choosing only by chest may leave the back uncovered; choosing only by length may make the chest too loose.
Consider:
- Which measurement the manufacturer says to prioritise
- How much adjustment the straps or fasteners provide
- Whether the fabric stretches
- Whether your dog has a deep chest, broad shoulders or a long back
- Whether the dog’s natural coat will be thicker later in the season
- Whether the larger size would extend over the tail or interfere with toileting
If the chart does not explain what to do, contact the retailer with all three measurements and the product name. If neither size accommodates your dog’s proportions, choose a different cut rather than accepting a restrictive or unstable fit.
Measuring puppies and growing dogs
Measure a puppy immediately before ordering and recheck the fit frequently. Buying a much larger garment “to grow into” can create loose straps, shifting fabric and a snagging risk. An adjustable design can provide useful flexibility, but it must still fit safely now.
Measuring over thick fur
Measure the dog in its normal coat condition for the season in which the garment will be used. Do not squash dense fur tightly, but do not hold the tape far away from the body. If a grooming appointment substantially changes the coat length, check the fit again afterwards.
How to check a dog coat when it arrives
Measurements narrow down the likely size; a supervised fitting confirms whether the shape works for your dog. Keep all packaging and labels attached until you have checked the retailer’s return conditions.
First fitting indoors
Introduce the garment calmly. Let your dog investigate it, reward relaxed behaviour and avoid pulling it over the head if your dog is worried. Dogs Trust recommends introducing clothing gradually and positively.
Once the coat is on, check that:
- The neckline does not press on the throat
- The chest fastening closes securely without squeezing the ribcage
- The front legs and shoulders move through their normal range
- The edges do not rub the armpits or elbows
- The back does not extend over the tail
- The belly section does not interfere with toileting
- No strap, buckle or toggle hangs loose enough to catch
- Your dog can stand, walk, turn, sit and lower their head naturally
Check it with walking equipment
Fit the collar or harness exactly as it will be used outdoors. Some garments are designed beneath a harness; others provide a purpose-made lead-access opening. Follow the instructions for both items and ensure that the coat does not alter the secure fit or cover the lead attachment.
Check again after movement
Let your dog walk around indoors for a few minutes. The coat should stay centred rather than twisting, sliding backwards or bunching at the shoulders. Remove it and inspect the skin and fur for pressure marks, rubbing or dampness.
A short, familiar first walk is safer than wearing a new coat immediately for a long outing. Stop if your dog freezes, repeatedly scratches at it, changes gait, pants unusually or tries to remove it.
Seven common dog-coat measuring mistakes
- Choosing by breed alone. Dogs within a breed can have different proportions.
- Using weight as the only measurement. Two dogs of equal weight may have different chest and back dimensions.
- Measuring while the dog is sitting. This can shorten or curve the back measurement.
- Starting at the wrong neck point. Coat length generally begins where the neck meets the shoulders, not at the head.
- Measuring to the tail tip. Back length ends at the base of the tail.
- Pulling the chest tape tight. This can lead to a restrictive garment.
- Assuming every brand uses the same size. Always use the chart attached to the exact item.
Choosing a coat after measuring
Fit is only one part of the decision. Match the garment to the conditions and your dog’s needs:
- A light rain layer may suit a dog that needs help staying dry in mild weather.
- An insulated coat may be more appropriate for an individual dog that struggles in colder conditions.
- A jumper can provide warmth in dry weather but may absorb rain unless designed for wet conditions.
- Reflective details can support visibility on darker walks but do not replace a suitable lead and attentive handling.
Browse PAWABY’s dog coats and clothes, then use the measurements and chart shown on the individual product page. For seasonal leads and walking equipment, visit our dog walking accessories.
Frequently asked questions
What measurements do I need for a dog coat?
Most dog coats require back length, chest girth and neck circumference. Some designs also request belly, waist or leg measurements. Follow the diagram for the exact garment.
Where do I measure a dog’s back for a coat?
Measure along the spine from the base of the neck, where it meets the shoulders, to the base of the tail. Keep the dog standing naturally and do not include the tail.
Where is the widest part of a dog’s chest?
It is normally the deepest or broadest part of the ribcage, often a short distance behind the front legs. Move the tape slightly if necessary to identify the greatest circumference while keeping it level.
Should I add extra centimetres to my dog’s measurements?
Only if the product instructions tell you to. Record the dog’s actual body measurements first. The retailer’s chart should explain any fit allowance or whether it lists garment measurements instead.
Should I size up if my dog is between sizes?
Not automatically. Check which measurement the brand prioritises and whether the larger size would become too long or loose. Contact the retailer when the chart is unclear, or choose another design if neither size suits your dog’s proportions.
How tight should a dog coat be?
It should stay securely in place without squeezing the chest, pressing on the throat, rubbing the front legs or restricting normal movement. The correct amount of room depends on the design, so use the product guidance and observe the dog while standing and moving.
How often should I remeasure my dog?
Remeasure puppies regularly and check adult dogs after meaningful weight, body-condition, grooming or coat-thickness changes. Measure again whenever you buy from a different brand or the product uses a different chart.
The bottom line
Learning how to measure a dog for a coat takes only a few minutes: keep your dog standing naturally, record the back, chest and neck twice, and compare those numbers with the exact product chart. Never rely on breed, weight or a familiar size label alone.
When the coat arrives, check movement, breathing, toileting clearance and compatibility with the harness or collar before the first proper walk. If the shape does not suit your dog, exchange it rather than trying to make an uncomfortable size work.
