How To Measure Your Dog's Collar. The correct spot to measure will be right above them. Do not measure right behind your dog’s armpits;
There are two ways to get the correct measurement for your dog's collar. Place the cord or tape measure around your dog's neck. When measuring a collar with a buckle, you should measure from the inside of the male connector (where the fabric meets the buckle, not the tip of the prongs) and the tip of the buckle on the female side.
Be sure to wrap the tape measure snug but not too tight.
Make sure you measure the area of your dog’s neck exactly where you. This is a very common mistake. Measure around the widest part of your dog’s neck, where it attaches to his torso. Do not measure right behind your dog’s armpits;