Durasoft hunt dog collars are measured from the middle of the buckle to the second adjustment hole from the end of the collar. This allows 2" of adjustment smaller and 1 larger. There is no need to add inches to the actual measurement of your dogs neck. The size of the dogs neck is the collar size needed.
Ring-in-Center: Safety collar, designed for hunting dogs.The center ring allows the collar to roll over if dog becomes entangled.
Dee-in-Front: Designed for tie-out use.The D would need to break through two layers of the material for dog to be set free.
Sunglo collars. add 4-5 inches to the dogs neck size measurement for the proper length collar