1. Take a piece of string and wrap it around your dog's neck to where the two ends touch. Collars are not supposed to be tight around the neck, so measure with two fingers inside the string on medium to large dogs and only one finger on small to extra small dogs.
2. Order the appropriate size range when checking out, and we'll send you your order made to fit.
X-Small: 8 - 10"
Small: 12 - 14"
Medium: 16 - 18"
Large: 18" - 20"
If the dog is in between sizes, please round up to nearest 1/2". For example, if your dog's neck size is 12.5" round up to 13" and order a size Small.