Pick a harness size from a dog's chest girth measurement.
A dog's chest girth, measured around the broadest part of the ribcage, maps directly to standard harness size bands, with chest width derived from the circumference. Choosing a harness from weight alone is unreliable because a deep-chested dog can need a larger size than a similar-weight, narrow one.
Dog Harness Size
Match measured chest girth to the brand's size bands
Match measured chest girth to the brand's size bands A dog's chest girth, measured around the broadest part of the ribcage, maps directly to standard harness size bands, with chest width derived from the circumference.
Choosing a harness from weight alone is unreliable because a deep-chested dog can need a larger size than a similar-weight, narrow one.
This calculator takes 1 input: Chest girth. The pre-filled defaults are a realistic starting point — replace them with figures from your own environment for a result you can act on.