For harnesses, use measurements to find best size. If in between sizes, we recommend sizing up.
Adjustable Collar Sizing:
Sizing
Neck circumference
Width
Small
6-13 inches
5/8 inch
Medium
13-20 inches
3/4 inch
Large
16-26 inches
1 inch
All collars are adjustable. Measure the circumference of your pet's neck around its largest area. If your pet is between sizes, we recommend sizing up. See width to understand how wide our collars are by size.