Measure around your dog's neck where the collar sits with a soft tape. Choose by neck measurement rather than weight.
| Size | Neck | Dog weight |
|---|
| S | 28–40 cm (11–16 in) | 9–15 kg (20–33 lb) |
|---|
| M | 38–50 cm (15–20 in) | 12.5–25 kg (28–55 lb) |
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| L1 | 40–54 cm (16–21 in) | 20–35 kg (44–77 lb) |
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| L2 | 44–58 cm (17–23 in) | 30–45 kg (66–99 lb) |
|---|
| XL | 52–66 cm (20–26 in) | 40–75 kg (88–165 lb) |
|---|
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.
Several neck ranges overlap, particularly M, L1 and L2. Choose by neck measurement; weight is only a cross-check. Measurements are taken by hand, so a 1–2 cm difference is normal.