 
   1. Length - section from the tip  of your animal's nose to the eye line. 
   2. Circumference - circumference  around your animal's snout  one inch below its eye line, should be sized with  mouth a little open. 
   3. Eye Line  - section from your animal's eye line to right  behind its ears. 
   4. Neck Circumference -  circumference around  your animal's neck right behind its ears and right behind the jaw. 
   5. Width - your animal's snout width in the widest part. 
   6. Height - your animal's snout height, should be sized with its mouth a little open. 
  To see more detailed instructions how to size your dog - Click here