Measure carefully as these collars are sized differently than standard collars with buckles.

Keep in mind the collar needs to slip over your dog’s head as there is no buckle.

First, measure the widest part of your dog’s head. Next, measure your dog’s neck as you would for a standard, buckle-style collar. Use the larger of the measurements to select a collar that fits between the ranges listed

Fully Contracted and Fully Extended Collar Measurements (inside of collar)
18″ adjusts 14″ – 20″
20″ adjusts 16″ – 22″
22″ adjusts 18″ – 24″
24″ adjusts 20″ – 26″
26″ adjusts 22″ – 28″