How to size a collar that actually fits

Fit anxiety is real. You're buying a collar online without being able to try it on your dog, and sizing charts vary by brand. Here is a simple two-step method that works regardless of breed or neck shape.

Step one: measure snugly, not tightly

Use a soft measuring tape. Hold it around the neck where the collar will rest — usually just below the ears and mid-throat. Pull it firm but not tight. Add two fingers of clearance. That's your size. For a narrow neck (sighthounds, whippets, greyhounds), add three fingers.

Step two: check the hardware placement

When buckled at the right size, the D-ring should sit at the center of the throat, not pulled to one side. If it migrates to the side, the collar is too loose. If it's impossible to slide two fingers under after buckling, it's too tight.

A note on breakaway vs fixed buckles

For dogs left unattended with the collar on, a fixed buckle is safer — it won't release accidentally on a fence or gate latch. For cats, always use breakaway. We ship fixed buckle on all dog collars and breakaway on cat collars by default.

If you're between sizes, size up and use the extra holes. A collar with room to adjust is better than one at its limit.