Measure your dog at the widest point of each area with a soft tape measure. If your dog is between sizes, size up for harnesses and apparel, and choose the larger paw width for boots.
Harnesses
| Size |
Neck Girth |
Chest Girth |
Approx. Weight |
| X-Small |
10–14 in |
13–20 in |
3–10 lb |
| Small |
13–18 in |
16–22 in |
10–20 lb |
| Medium |
16–22 in |
20–28 in |
20–50 lb |
| Large |
19–25 in |
26–32 in |
50–80 lb |
| X-Large |
22–28 in |
31–40 in |
80 lb + |
Collars
| Size |
Neck Girth |
Adjustment Range |
| X-Small |
10–14 in |
1 in webbing |
| Small |
12–16 in |
1 in webbing |
| Medium |
16–20 in |
1.5 in webbing |
| Large |
19–25 in |
1.5 in webbing |
Apparel
| Size |
Back Length |
Chest Girth |
Neck Girth |
| XX-Small |
8 in |
14–17 in |
9–12 in |
| X-Small |
10 in |
17–20 in |
11–14 in |
| Small |
12 in |
20–24 in |
13–17 in |
| Medium |
16 in |
24–29 in |
16–20 in |
| Large |
20 in |
29–34 in |
19–24 in |
| X-Large |
24 in |
34–40 in |
22–28 in |
Boots & Socks
| Size |
Paw Pad Width |
Sold As |
| X-Small |
1.5 in |
Set of 2 |
| Small |
2 in |
Set of 2 |
| Medium |
2.5 in |
Set of 2 |
| Large |
3 in |
Set of 2 |
| X-Large |
3.5 in |
Set of 2 |
Tip: Measure your dog’s front paws — they are usually larger than the rear. Mix sizes within a set if your dog’s front and back paws differ.