What size backpack can be carried on a plane?

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Tags

1. #dimensions
2. #maximum
3. #depth
4. #guidelines
5. #allowable
6. #allow
7. #linear
8. #length
9. #airport
10. #inches
11. #larger
12. #width
13. #carry
14. #prevent
15. #should
16. #luggage
17. #problems
18. #airlines
19. #these
20. #airline