Step-by-Step Guide to Fitting a Dog Collar Correctly

Quick answer

To fit a dog collar correctly, measure your dog's neck, choose a collar width that matches their size, and adjust it so you can fit two fingers comfortably between the collar and your dog's neck. Check the fit regularly, especially for growing puppies or dogs that gain or lose weight.

A well-fitted collar is more than a fashion statement—it's a safety essential. Whether you're heading out for a daily walk or just want your dog to wear an ID tag, the right fit prevents choking, escapes, and skin irritation. In this guide, we'll walk you through the exact steps to measure, adjust, and test a collar so it's both secure and comfortable.

We'll also highlight what to look for in a collar, from material to hardware, so you can make an informed choice. If you're considering a new collar, the Urban Classic™ Collar from DOG Copenhagen is a great example of a well-designed everyday option—but the fitting principles apply to any collar you choose.

Measure Your Dog's Neck

Start by measuring your dog's neck with a flexible tape measure. Wrap it around the base of the neck, where the collar will naturally sit—usually just below the ears and jaw. Keep the tape snug but not tight, and note the measurement in inches or centimeters.

This measurement is the minimum size your collar should be. Most collars have an adjustable range, so choose one that fits comfortably within that range. For example, the Urban Classic™ Collar is designed to fit most dogs, but always check the specific size range before purchasing.

• Measure twice to ensure accuracy, especially if your dog is wiggly.
• If between sizes, size up for comfort and adjustability.

Choose the Right Collar Width

The width of the collar should match your dog's size and breed. A narrow collar on a large dog can dig into the neck, while a wide collar on a small dog may be too heavy or restrictive. As a rule, small dogs do well with 0.5-inch collars, medium dogs with 0.75-inch, and large breeds with 1-inch or wider.

Material also matters. The Urban Classic™ Collar is made of soft, durable vegan leather, which is gentle on the skin and easy to clean. It's a good choice for everyday wear because it won't absorb odors or cause friction like some rougher materials.

• Check the collar's width against your dog's neck length—it should not cover more than half the neck.

Adjust the Collar for a Proper Fit

Once you have the collar, fasten it around your dog's neck. The collar should sit high on the neck, just behind the ears, and be snug enough that it doesn't slip over the head. You should be able to slide two fingers flat between the collar and your dog's neck—this is the universal test for a proper collar fit.

If you can fit more than two fingers, the collar is too loose and your dog could back out of it. If you can't fit any fingers, it's too tight and could cause choking or discomfort. Adjust the buckle or slide until you achieve the perfect two-finger fit.

• Re-check the fit after your dog eats or drinks, as the neck can swell slightly.

Test the Collar for Safety

A properly fitted collar should not rotate freely around your dog's neck. If it spins, it's too loose. You should also ensure that the collar doesn't rub or chafe, especially on short-haired breeds. Run your hand under the collar to check for any signs of irritation.

Check the hardware: buckles, D-rings, and attachments should be sturdy and free of sharp edges. The Urban Classic™ Collar features satin-polished stainless steel hardware, which is both durable and gentle on your dog's skin. It also has a separate ID attachment point, so you can keep tags secure without interfering with the leash connection.

• Do a 'back-out test' by gently pulling on the collar—if it slips over your dog's head, it's too loose.

Monitor and Adjust Over Time

Your dog's neck size can change due to weight fluctuations, growth, or seasonal coat changes. Puppies grow quickly, so check the fit weekly. Adult dogs should be checked monthly. A collar that was once perfect can become too tight or too loose without you noticing.

If you find yourself constantly adjusting, it might be time for a new collar. The Urban Classic™ Collar is designed for everyday use and maintains its shape well, but like any collar, it will eventually need replacing. Always ensure the collar is clean and free of damage—a worn collar is a safety risk.

• Set a reminder to check the fit every month, and more often for puppies.

Step-by-step fitting checklist

1. Measure the neck: Use a flexible tape measure at the base of the neck where the collar sits. Keep it snug but not tight, and record the measurement. Common mistake: measuring too high on the neck, which can cause the collar to slip off.
2. Select the right collar width: Match the collar width to your dog's size. Small dogs need narrower collars, while large breeds need wider ones for comfort and control. Checkpoint: The collar should not cover more than half the neck length.
3. Fasten and adjust: Put the collar on and adjust so it sits high on the neck. You should be able to fit two fingers between the collar and the neck. Common mistake: leaving too much slack, which allows the collar to rotate or slip over the head.
4. Test for safety: Gently pull on the collar to ensure it doesn't slip over the head. Check for any signs of chafing or rubbing, and inspect hardware for sharp edges. Checkpoint: If the collar spins freely, it's too loose—tighten it.
5. Re-check regularly: Monitor the fit weekly for puppies and monthly for adult dogs. Adjust as needed due to weight changes or coat growth. Common mistake: forgetting to adjust after your dog gains or loses weight, leading to discomfort or escape risk.

Products that help with collar fitting

• Urban Classic™ Collar: The Urban Classic™ collar from DOG Copenhagen is a stylish and elegant everyday collar made of soft and durable vegan leather of the highest quality with satin-polished stainless steel hardware. The collar is soft and comfortable for the dog to wear, easy to clean and comes with a separate ID attachment point. The soft vegan leather reduces the risk of skin irritation, and the separate ID attachment point keeps tags from clinking against the leash ring, making it easier to check the fit without interference.
• Urban Classic™ Leash: The Urban Classic™ leash from DOG Copenhagen is a stylish and elegant 200cm multifunction leash made from soft and durable vegan leather of the highest quality with satin-polished stainless steel hardware and dual aluminum carabiners with locking option. The leash is 3-way adjustable and can also be used hands-free by wearing it crossbody. Pairing a properly fitted collar with a well-designed leash ensures control and safety during walks. The 3-way adjustability lets you switch between hands-free and traditional handling, which is especially useful when training loose-leash walking.

Fitting a dog collar correctly is a simple process that takes just a few minutes but pays off in safety and comfort every day. By measuring, choosing the right width, adjusting to a two-finger fit, and checking regularly, you'll ensure your dog enjoys every walk without irritation or risk. A quality collar like the Urban Classic™ Collar makes the job easier with its soft, durable materials and thoughtful design.