Béis The Expandable Backpack: 15 x 13 x 5 in
personal-item backpack, backpack, no wheels, 1.67 lb empty. Exterior figures are the maker's own.
Under the seat at 7 of 13 airlines with a published limit
The table below shows the verdict at every airline, best fit first, using the same math as the live fit checker.
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Does the Expandable Backpack fit? All 19 airlines
15 x 13 x 5 in against each airline's published carry-on box, largest side to largest side, sorted best fit first.
Expansion warning: zipped open, this bag runs 7 in deep (15 x 13 x 7 in) and clears 19 of 19 airlines instead of 19. No airline verdict changes, but a packed-out bulge can still catch in the sizer.
| Airline | Cabin max (in) | Verdict | Under seat |
|---|---|---|---|
| British Airways | 22 x 18 x 10 | Cabin approved5 in to spare | No |
| Allegiant Air | 22 x 16 x 10 | Cabin approved3 in to spare | Yes |
| Frontier Airlines | 24 x 16 x 10 | Cabin approved3 in to spare | Yes |
| Southwest Airlines | 24 x 16 x 10 | Cabin approved3 in to spare | not published |
| Sun Country Airlines | 24 x 16 x 11 | Cabin approved3 in to spare | Yes |
| Lufthansa | 21.65 x 15.75 x 9.06 | Cabin approved2.8 in to spare | No |
| Ryanair | 21.65 x 15.75 x 7.87 | Cabin approved2.8 in to spare | No |
| Turkish Airlines | 21.65 x 15.75 x 9.06 | Cabin approved2.8 in to spare | No |
| Air Canada | 21.5 x 15.5 x 9 | Cabin approved2.5 in to spare | Yes |
| Emirates | 21.65 x 14.96 x 8.66 | Cabin approved2 in to spare | not published |
| Qatar Airways | 19.69 x 14.57 x 9.84 | Cabin approved1.6 in to spare | not published |
| Alaska Airlines | 22 x 14 x 9 | Cabin approved1 in to spare | not published |
| American Airlines | 22 x 14 x 9 | Cabin approved1 in to spare | Yes |
| Avelo Airlines | 22 x 14 x 9 | Cabin approved1 in to spare | Yes |
| Delta Air Lines | 22 x 14 x 9 | Cabin approved1 in to spare | not published |
| Hawaiian Airlines | 22 x 14 x 9 | Cabin approved1 in to spare | not published |
| JetBlue Airways | 22 x 14 x 9 | Cabin approved1 in to spare | Yes |
| United Airlines | 22 x 14 x 9 | Cabin approved1 in to spare | No |
| Air France | 21.7 x 13.8 x 9.9 | Cabin approved0.8 in to spare | No |
Bag spec source: beistravel.com · accessed 2026-07-09. Airline limits come from each carrier's official baggage page; open an airline above for its citations. Policies change, so verify a borderline case before you fly.
For its hardside rollers, Béis publishes a labeled exterior figure that it states includes the wheels and telescoping handle, alongside a separate smaller interior figure for usable packing space, both in inches. For its soft weekenders and backpacks it publishes a single unlabeled Dims figure with no exterior/interior split, and no wheels are present on those styles. The Hybrid roller line additionally shows a parenthetical centimeter conversion next to the inch figure.
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