Choosing the Correct Nylon Collar Size:
LENGTH OF COLLAR
Measure the circumference of the dog's neck and add 2".
Collars should fit comfortably on the dog's neck.
You should be able to put 2 fingers between the collar and the dog's neck.
WIDTH OF COLLAR
Size of Dog
Best Width Size
Puppies and Small Dogs
5/8"
Small to Medium Dogs
3/4"
Large Dogs
1"