| Size | Neck | Width |
|---|
| XS | 21–26 | 3 |
|---|
| S | 26–34 | 3 / 3.8 |
|---|
| M | 34–42 | 3.8 |
|---|
| L | 41–49 | 3.8 |
|---|
All measurements in cm.
Allow for a 1–2 cm measurement variation. S lists two widths, 3 and 3.8 cm. Measure neck and compare with the chart. For a collar without an opening buckle, check that it can pass over the head. Check adjusted fit before use; the collar must not constrict the neck when the smaller loop closes. Choose by measurements rather than breed.