*Here at M1-K9, we think every dog should have a choker. Not so much to choke your dog, but it's great spot to put a dog tag and can be worn 24/7. That way, when your dog is "off duty" he can take off his M1-K9 Collar while still having his dog tag on. I like my dogs choker to be loose. Measure the part of his neck that you want it to rest, so more of the base of his neck. If your dogs neck measures 22" under his ears, go with a 26". That way it's comfortable when he's layin' around.