How to Measure Your Dog for a Coat or Jacket (With a Simple Size Chart)
Measure Before You Buy
Dog clothing sizes vary a lot from brand to brand, so a medium in one store can be a small in another. A few minutes with a soft tape measure and a treat helps you pick the right size the first time, especially when ordering online.
The Three Key Measurements
- Back length: from the base of the neck, where the collar sits, to the base of the tail.
- Chest girth: around the widest part of the ribcage, just behind the front legs.
- Neck circumference: where a collar normally sits.
Measure while your dog is standing, keep the tape snug but not tight, and write down the numbers.

Reading a Size Chart
Compare each of your measurements to the brand's chart. If your dog falls between two sizes, choose the larger for a comfortable fit, especially for thick-coated dogs or if the garment will be layered. Pay attention to the chart's length and chest guidance more than weight.
Check the Fit on Arrival
- You should fit two fingers under the chest strap.
- The coat should cover the back and chest without restricting leg movement.
- Check that the neck opening does not rub.
- Make sure the belly is covered properly and the leash can still attach to a harness or collar.
Common Mistakes
- Measuring a squirming dog: get a helper or use treats.
- Ignoring chest size: it determines comfort and movement.
- Choosing by weight: body shapes differ widely.
- Buying too small: tight coats can chafe.
Frequently Asked Questions
What if my dog is between sizes?
Choose the larger size for comfort, unless the garment has adjustable straps.
How do I measure a deep-chested dog?
Measure the widest part of the chest carefully, and check the chart for chest girth.
Can I return a coat if it does not fit?
Check the store's return policy before ordering.
Quick Takeaways
Measure back length, chest, and neck. Use the size chart, and check the fit on arrival.
Shop dog jackets in our pet clothing collection.
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