Hurtta and Canada Pooch size their coats by back length, from the base of the neck to the base of the tail, and chest girth; Ruffwear by girth alone. Canada Pooch says the chest girth matters even more than the back length.
How to measure
- Back length: from the base of the neck, where it meets the shoulders, to the base of the tail (Hurtta, Canada Pooch).
- Chest: around the widest part of the rib cage, just behind the front legs.
- Neck: around the base of the neck, for Hurtta’s chart.

Hurtta Walk All-Season Jacket
| Size | Back length | Neck | Chest |
|---|---|---|---|
| 28 / 11″ | 9.8–11.8 in (25–30 cm) | 7.9–11.8 in (20–30 cm) | 11.8–17.7 in (30–45 cm) |
| 30 / 12″ | 10.6–12.6 in (27–32 cm) | 9.8–13.8 in (25–35 cm) | 13.8–19.7 in (35–50 cm) |
| 35 / 14″ | 12.6–14.6 in (32–37 cm) | 9.8–15.7 in (25–40 cm) | 15.7–21.7 in (40–55 cm) |
| 40 / 16″ | 14.6–16.5 in (37–42 cm) | 9.8–17.7 in (25–45 cm) | 17.7–23.6 in (45–60 cm) |
| 45 / 18″ | 16.5–18.5 in (42–47 cm) | 11.8–19.7 in (30–50 cm) | 19.7–25.6 in (50–65 cm) |
| 50 / 20″ | 18.5–20.5 in (47–52 cm) | 13.8–21.7 in (35–55 cm) | 21.7–29.5 in (55–75 cm) |
| 55 / 22″ | 20.5–22.4 in (52–57 cm) | 15.7–23.6 in (40–60 cm) | 23.6–31.5 in (60–80 cm) |
| 60 / 24″ | 22.4–24.4 in (57–62 cm) | 17.7–23.6 in (45–60 cm) | 25.6–33.5 in (65–85 cm) |
| 65 / 26″ | 24.4–26.4 in (62–67 cm) | 17.7–25.6 in (45–65 cm) | 27.6–35.4 in (70–90 cm) |
Canada Pooch
| Size (back length) | Chest girth up to |
|---|---|
| 8 | 16 |
| 10 | 18 |
| 12 | 21 |
| 14 | 22 |
| 16 | 26 |
| 18 | 28 |
| 20 | 30 |
| 22 | 33 |
| 24 | 34.5 |
| 26 | 38 |
| 28 | 39 |
| 30 (select styles) | 42 |
| 32 (select styles) | 43 |
| 34 (select styles) | 45 |
| 36 (select styles) | 47 |
Sizes 30 to 36 come in select styles only, and Canada Pooch says to check the size on each product, since sizes may vary slightly.
Ruffwear coats
Ruffwear sizes its apparel by girth alone, on the same chart as its harnesses and packs.
| Size | Girth (in) | Girth (cm) |
|---|---|---|
| XXXS | 9–13 | 23–33 |
| XXS | 13–17 | 33–43 |
| XS | 17–22 | 43–56 |
| S | 22–27 | 56–69 |
| M | 27–32 | 69–81 |
| L | 32–36 | 81–91 |
| XL | 36–42 | 91–107 |
The same back size, two fits
Canada Pooch’s size 16 is a 16 in back with a chest up to 26 in. Hurtta’s 40 / 16 is a 14.6–16.5 in back with a 17.7–23.6 in chest. Measure both before you choose.