| Size | Chest Girth (cm / in) | Back Length (cm / in) | Recommended Weight (kg / lbs) |
|---|---|---|---|
| S | 35 cm / 13.8 in | 24 cm / 9.4 in | 1.5–2.5 kg / 3.3–5.5 lbs |
| M | 40 cm / 15.7 in | 28 cm / 11.0 in | 2.5–4 kg / 5.5–8.8 lbs |
| L | 45 cm / 17.7 in | 33 cm / 13.0 in | 4–5.5 kg / 8.8–12.1 lbs |
| XL | 50 cm / 19.7 in | 38 cm / 15.0 in | 5.5–7 kg / 12.1–15.4 lbs |
| 2XL | 58 cm / 22.8 in | 40 cm / 15.7 in | 7–10 kg / 15.4–22 lbs |