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Chest
Measure all the way around the widest part of the ribcage, just behind the front legs. This is the measurement that decides the size.
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Neck
Measure around the base of the neck, where a collar naturally sits — not up under the jaw.
| Size |
Chest |
Neck |
Weight |
| XS |
33–43 cm (13.0–16.9 in) |
27–32 cm (10.6–12.6 in) |
1.5–2.5 kg (3.3–5.5 lb) |
| S |
43–56 cm (16.9–22.0 in) |
31–34 cm (12.2–13.4 in) |
2.5–5 kg (5.5–11 lb) |
| M |
56–69 cm (22.0–27.2 in) |
38–50 cm (15.0–19.7 in) |
5–10 kg (11–22 lb) |
| L |
69–81 cm (27.2–31.9 in) |
45–59 cm (17.7–23.2 in) |
10–17.5 kg (22–38.5 lb) |
| XL |
81–91 cm (31.9–35.8 in) |
53–68 cm (20.9–26.8 in) |
17.5–27.5 kg (38.5–60.5 lb) |
| XXL |
91–107 cm (35.8–42.1 in) |
58–75 cm (22.8–29.5 in) |
27.5–40 kg (60.5–88 lb) |
Between two sizes? Go up — the side straps take in the slack, and a jacket that is slightly roomy still floats level. Weight is a rough guide only; go by the chest measurement.
