How to Measure Your Dog for a Collar UK

Getting your dog's collar size right matters more than most people realise. A collar that is too loose can slip over the head and let your dog escape. A collar that is too tight can rub, restrict breathing, and cause real discomfort. The good news is that measuring your dog for a collar takes less than a minute, and you do not need anything more than a soft tape measure or a piece of string.

This guide walks through exactly how to measure your dog's neck, how to apply the two finger rule, and what to do if your dog is still growing or has a slim, sighthound-shaped neck.

What You Will Need

A soft fabric tape measure is ideal, the kind used for sewing or dressmaking, not a rigid metal tape. If you do not have one, a piece of string or ribbon works just as well. Simply wrap it around your dog's neck, mark where it overlaps, then lay it flat against a ruler to get your measurement.

Step 1: Find the Right Spot

Measure at the base of your dog's neck, just above the shoulders, where a collar naturally sits. This is usually the widest part of the neck and gives you the most accurate, comfortable fit. If your dog has a thick or fluffy coat, measure through the fur rather than pressing down to the skin, since the collar will sit on top of the coat, not underneath it.

Step 2: Wrap and Apply the Two Finger Rule

Wrap the tape or string snugly around your dog's neck at that spot. Snug means close to the neck, not loose, but not pulled tight either. Once wrapped, slide two fingers flat between the tape and your dog's neck. You should be able to do this comfortably. If you can only fit one finger, the loop is too tight. If three or more fingers slide in easily, it is too loose.

This two finger rule is the standard used across the pet industry and is the most reliable way to judge a comfortable, secure fit, whether you are measuring for a new collar or checking the fit of one your dog already wears.

Step 3: Note Your Measurement

Write down the number where the tape or string overlaps. This is your dog's neck circumference, and it is the figure you will use to choose a collar size.

UK Collar Sizing Guide

At Bhooki, our standard dog collar sizes are based on neck circumference as follows:

• Extra Small: 8 to 12 inches
• Small: typically suited to small breeds such as Chihuahuas, toy breeds, and puppies
• Medium: suited to breeds such as Cocker Spaniels and Border Collies
• Large: suited to breeds such as Labradors and Golden Retrievers
• Extra Large: suited to larger breeds such as Mastiffs and Saint Bernards

Always check our complete pet size guide for the full breakdown by collar type, including martingales and bandanas. If your dog's measurement falls right on the boundary between two sizes, it is usually best to choose the larger size and adjust the buckle, rather than risk a collar that is too tight.

What If My Dog Is Still Growing?

Puppies can grow through two or three collar sizes in their first year alone. If you are buying for a puppy, choose an adjustable collar with a generous range of adjustment holes, and re-measure every few weeks. It is far better to re-check too often than to leave a growing puppy in a collar that has become too tight.

What If My Dog Has a Slim, Narrow Neck?

Some breeds, including whippets, greyhounds and other sighthounds, have a head that is the same width as their neck, or even narrower. For these dogs, a standard flat collar can slip off entirely, no matter how carefully you measure. If this sounds like your dog, a martingale collar is the safer choice. It uses a limited slip design that tightens gently when your dog pulls, without the risk of sliding over the head.

Checking the Fit Once the Collar Arrives

Once your new collar arrives, repeat the two finger test with the actual collar fastened at its normal position. If you cannot fit two fingers underneath, loosen it a notch. If the collar gaps or rotates freely around the neck, tighten it a notch. Recheck the fit every few weeks, and always after a grooming appointment, a growth spurt, or any noticeable change in weight.

A Final Word

Measuring your dog correctly takes a minute, and it is one of the simplest things you can do to keep them safe and comfortable. Once you have your measurement, check our size guide to confirm your collar size, then browse our full range of handmade African print dog collars, individually cut and sewn in the UK from authentic Ankara cotton.