There are three widths of webbing in the Perfect Fit system with appropriately sized buckles and clips. Within each size of webbing, there are different sizes of girth pieces.
15mm (.59" wide) Webbing Girth Straps
For small dogs that do not pull
|XS||12-1/2 - 15-3/4||32-40|
|S||15-3/4 - 19-1/2||40-50|
|M||19-1/4 - 23-1/4||49-59|
20mm (.78" wide) Webbing Girth Straps
For small dogs that pull, medium dogs, and large dogs.
|S||17-3/4 - 21-1/2||45-55|
|M||20-3/4 - 25-1/2||53-65|
|L||24-1/4 - 29-1/2||62-75|
|XL||29-1/4" - 33-3/4||74-86|
40mm (1.57" wide) Webbing
For very strong pullers, large dogs, and giant breeds.
|M||25-1/4 - 33-1/2||64-85|
|XL||33-1/2 - 41-3/4||85-106|
|XXL||36-1/2 - 48||93-122|
How to Measure Your Dog
Using a flexible measuring tape, measure snugly just behind your dog’s front legs all the way around him. You are measuring the circumference of his body just behind the front legs, the girth, like measuring a person for a belt. Be sure that your dog is standing squarely.
Look up your dog's girth measurement in the webbing size range that you have determined is appropriate for your dog. There may be more than one choice of girth strap for your dog. For example, if your dog’s girth is 30", either a 40mm Medium or Large will fit him. The larger size girth strap will have a large area of fleece padding on it and is likely to be the better choice. You can also consult the breed chart for a girth sizing recommendation.
Click here to refer to the Perfect Fit Harness Selection Guide for girth size recommendations for different breeds and types of dogs as well as guidelines for which size top piece and front piece to purchase. If the breed chart recommends one size up from what your girth measurement gives you, we recommend going with the larger girth strap to ensure there is enough fleece padding on the strap to protect your dog's skin.