Sources and method
Every number on this site comes from one of the pages below. Airline pages were last checked 5 October 2026 unless noted. How we use them: about the fit check.
Airlines
Regulators
- FAA (US Federal Aviation Administration) PackSafe; regulation 49 CFR 175.10(a)(18) (PHMSA HMR)
- UK Civil Aviation Authority
- EASA (European Union Aviation Safety Agency)
- Transport Canada / CATSA (Canadian Air Transport Security Authority)
- CASA (Civil Aviation Safety Authority, Australia)
- ICAO Technical Instructions 2025-2026 / IATA Dangerous Goods Regulations 67th (2026) edition – IATA passenger lithium battery guidance (revised 31/03/2026)
Bag brands
Bag dimensions are read from each brand's own product pages: Aer, Aerolite, Antler, Away, BAGSMART, BÉIS, Briggs & Riley, Cabin Max, CabinZero, CALPAK, Cotopaxi, DELSEY, Eagle Creek, Eminent, Herschel, Horizn Studios, Hynes Eagle, IT Luggage, kensie, Kipling, Lo & Sons, Matador, MATEIN, Mokobara, Monos, Nomad Lane, NOMATIC, Osprey, Pacsafe, Ricardo Beverly Hills, ROAM, Solgaard, Stratic, Tortuga, Travelers Club, Travelpro, WANDRD, Wrangler.