Dog Harness Size Calculator

in
Measure around the widest part of the chest, behind the front legs.
lbs
Biology

Find the right dog harness size based on your dog's chest girth and weight.

Formula

Size by girth: <14in=XS, 14–18=S, 18–24=M, 24–30=L, 30–38=XL, 38+=XXL
  • Chest girth is the primary measurement for harness sizing.
  • Always try the harness on your dog and ensure you can fit two fingers under the harness.

22-inch girth, 25 lb dog

Inputs
  • Chest Girth: 22 in
  • Dog Weight: 25 lbs

Girth 22 in falls in the 18–24 in range → Medium (M).

Frequently asked questions

Where do I measure girth?
Measure around the widest part of the ribcage, just behind the front legs.
Should I size up for a growing puppy?
Yes. Measure frequently and consider adjustable harnesses for puppies.