TREK™ Collar Size Chart
The TREK™ Collar uses its own sizing. Measure your dog’s neck where the collar will naturally sit and compare the measurement with the chart below.
| Size | Neck Girth |
|---|---|
| Medium | 13.5–16.5 in / 34–42 cm |
| Large | 17–20.5 in / 43–50 cm |
| Extra Large | 20–24 in / 51–61 cm |
How to Measure
Wrap a soft measuring tape around your dog’s neck where the collar would naturally sit. Keep the tape flat and comfortably secure without pulling it tightly.
You should be able to fit two fingers between the measuring tape and your dog’s neck. If your dog falls between sizes or is still growing, choose the larger size for additional adjustment room.