How to Measure Your Dog For a Collar
Loosely measure the dog’s neck with a soft tape measure where the collar normally sits. Slide two fingers between the dog’s neck and the measure tape. This will give your dog the space needed so that the dog collar is snug, but not tight. If you do not use your two fingers, be sure to add two inches to your measurement.
When fitting a dog collar it should not be loose enough to slip over the dog’s head, nor so tight as to restrict breathing or cause coughing. If fitting for a puppy keep in mind that puppies grow quickly, so it is extremely important to adjust the size of their collars as they get bigger. Choosing an adjustable collar for puppies allows you to size the collar up as the dog grows, but depending upon the breed of the dog most puppies will likely grow to require a whole new collar size.
To get an accurately sized collar to fit your dog, measure the center of their neck with a cloth tape measure or piece of string, a few inches down from their head. Pull the tape/string snug, but not tight. If you used a piece of string, measure it with a rigid ruler afterwards.
How soon should I get a collar?
Many people want to have a collar to hand to put on their puppy as soon as they arrive at their new home. It’s a good idea to get your puppy used to wearing a collar from day one. It is the law that all dogs (there are a few exceptions to this) must wear a collar with identification. Ideally, the sooner your puppy starts wearing a collar, the quicker they will get used to it. So that means getting a collar for your puppy before they arrive home, and before you’ve had a chance to measure them!