| Dog Backpack Sizing Guide |
| Size |
Length |
Chest |
Boosters |
Zipper |
| Small |
18.5-21 in
(47-53 cm) |
15-20 in
(38-50 cm) |
2 (6 in) |
Retracted
Normal |
Small/
Med |
21-23 in
(53-58 cm) |
15-24 in
(38-60 cm) |
1 (3 in) |
Retracted
Normal |
| Medium |
23-26 in
(58-66 cm) |
15-28 in
(38-70 cm) |
None |
Retracted
Normal
Expanded |
| Large |
Up to 26 in
(66 cm) |
Up to 31.5 in
(80 cm) |
None |
Normal
Expanded |
How to Fit:
- Measure length (base of tail to base of neck)
- Chest (circumference of chest measured behind front legs).
- Add 1-2 booster blocks if less than 23 in / 58 cm.
- Adjust retractable/expandable zippers as needed.
- Ensure the dog's head clears the top of the backpack
- Ensure the internal support harness is secure.
Important Limitation Considerations:
- Min Length: 18.5 in (47 cm) with 2 boosters; shorter dogs won’t have head clearance.
- Max Length: 26 in (66 cm); longer dogs won’t fit.
- Min Chest: 15 in (38 cm); smaller chests may slip out of the internal support harness.
- Max Chest: 31.5 in (80 cm); larger chests won’t fit, even with fully expanded setting.
