Last updated: October 26, 2026
What Size Bag is a free reference provided as a guide. By using the site, you agree to these terms.
Guidance, not a guarantee
Airline and security rules change often. Limits here are dated; check your airline and the security rules for your airport before you fly.
Provided “as is”
The site is provided “as is,” without warranties of any kind. To the extent permitted by law, What Size Bag is not liable for any loss or damage arising from use of the site.
Rules on the day
Airlines decide what fits on board, and security officers decide what passes the checkpoint. A bag or item that meets the published rule can still be refused on the day.
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Changes
We may update these terms from time to time. Continuing to use the site means you accept the current version.