Country Brook Design Martingale Dog Collar & Leash, Snowy Pines, X-Large

To get the most accurate size collar for your furry best friend, measure the center of their neck a with a cloth tape measure, a few inches down from their head. Pull the tape snug, but not tight. If you don't have a tape measure, you can also use a piece of string and measure it with a rigid ruler afterwards. Make sure there’s enough room for about two fingers between the collar and your pup’s neck.

We recommend if you have a toy breed or small dog, add an inch to the neck measurement. For medium and large dogs, add two inches to the neck measurement.