Measuring a pet’s exact neck size
Measure the center of your pet’s neck using a cloth measuring tape. If you do not have a cloth tape measure, use a piece of string and then measure the string. Pull the tape or string up to your pet’s neck with no slack.
If your pet has a thick coat, be sure to pull the tape measure or string through the coat and to the dog’s neck.
If your pet has loose neck skin, be sure to pull the tape measure or string through the loose skin slightly.
If your pet has an existing collar, flatten out the collar and measure from the current adjustment hole that the collar is set in, to the other end of the collar (the buckle is not part of the measurement)