The collar should not be loose enough to slip over your dog’s head.
The collar should not be so tight that it restricts your dog’s breathing or causes coughing.
You will need:
A cloth measuring tape.
If you do not have a cloth measuring tape, a piece of string or something similar, a marker and a measuring tape.
How to measure:
The dog’s neck in this picture measures 19 inches.
Place the cloth measuring tape or the string around the middle of your dog’s neck.
The best way to measure is to have your dog standing. Avoid your dog turning his/her head during the measuring process.
Do not measure too close to the top of the neck, close to the ears where the neck tapers inward.
Do not measure too close to the bottom of the neck where the neck begins to widen.
Do not pull the measuring tape or string too tight or let it hang too loose.
When you measure, make sure your fingers are not underneath the measuring tape or string.