Measure around your dog's neck where the collar sits with a soft tape. Choose by neck measurement rather than weight.
| Size | Neck |
|---|
| M | 35–45 cm (14–18 in) |
|---|
| L | 45–55 cm (18–22 in) |
|---|
| XL | 55–65 cm (22–26 in) |
|---|
Once fastened, two fingers should slide flat between the collar and your dog's neck. If your dog is between sizes, choose the larger one, ensuring its adjustment range allows this fit.
Adjacent neck ranges meet at 45 cm and 55 cm. Dog weight ranges are not provided. Measurements are taken by hand, so a 1–2 cm difference is normal.