How to Properly Fit a Kydex Collar for Your Dog
By K9 Tactical Gear Inc | Published: 2026-10-17
Category: How-to Guides
Learn the correct way to measure, adjust, and fit a kydex collar for your working dog. Avoid common sizing mistakes and ensure comfort and control.
Quick answer
To fit a kydex collar correctly, measure your dog's neck circumference at the widest point, then choose a collar that allows two fingers to slide snugly between the collar and the neck. Adjust the buckle or strap so the collar sits high on the neck, just behind the ears, without slipping over the head.
Why Kydex Collars Need a Different Fit
Kydex collars are rigid and do not stretch or conform like nylon or leather. This makes them extremely durable and secure for working dogs, but it also means the fit must be precise. A collar that is too loose can slip off, while one that is too tight can cause chafing or restrict breathing. The key difference is that you cannot rely on the material to give over time, so initial measurement is critical.
Tools You Will Need
You only need a soft fabric measuring tape and your dog. If you do not have a measuring tape, use a piece of string and then measure it against a ruler. Do not use a metal tape measure, as it can be inaccurate on a curved surface. Have your dog stand in a neutral position with their head at a normal height.
Step-by-Step Kydex Collar Fitting
- Measure the Neck: Wrap the measuring tape around the widest part of your dog's neck, usually just behind the ears and down to the front of the chest. Pull it snug but not tight. Record the measurement in inches. Common mistake: measuring too low on the neck where the collar will slip off. Always measure at the base of the skull.
- Choose the Correct Size: Compare your measurement to the manufacturer's size chart. For a kydex collar, you want the collar to be approximately 2 inches longer than the neck measurement to allow for the buckle and adjustment holes. If between sizes, choose the larger size. Checkpoint: The collar should not be so long that the buckle sits on the side of the neck; it should center under the jaw.
- Adjust the Fit: Place the collar on your dog with the buckle centered under the chin. Tighten until you can fit two fingers flat between the collar and the neck. The collar should not slide down the neck when you gently pull it forward. Common mistake: overtightening. If you cannot fit two fingers, the collar is too tight and may restrict breathing or cause pressure sores.
- Check for Movement and Comfort: With the collar fastened, gently tug on the collar from different angles. It should not rotate more than a quarter turn around the neck. Watch your dog for signs of discomfort like pawing at the collar or shaking the head. Checkpoint: After 10 minutes of wear, recheck the fit. If the collar has shifted or left red marks, adjust accordingly.
Recommended Product for This Guide
- Garmin T 5X & TT 15X Series Collar: This collar was designed to replace the standard plastic strap and perfectly fit into our... If you are using a Garmin Alpha tracking or training system, this kydex collar replaces the factory plastic strap with a more durable, secure fit that stays in place during off-leash work.
