This is a very practical and well-balanced collar. It looks very nice at the base of the neck and even slightly onto the shoulders. The close is about 5" which should be more than adequate.
Tooled Medium Brown Chain Martingale Collar (24")
Tooled medium brown harness leather chain martingale collar; 5/8" width; Large stainless steel
3 ring assembly chain; 24" inner circumference
Because the chain martingale collar needs to slip over your dog's head, you need to measure the largest point BEFORE it slips onto and over the ears. Using a flexible tape measure is helpful. The measurement around the head will be the inner circumference or inner measurement of the collar. Be careful to avoid fingers under the measuring tape. Remember that it is easier to slide a collar over the head and onto the neck than to pull it off.