Airline Carry-On Bag Sizer
登机口被罚 99 美元还是在家花费 0 元。量一次尺寸，便知你的行李在各大航空公司的合规情况。
Enter your bag's dimensions — see instantly which airline sizer boxes it fits, and what basic fares charge.
Popular Luggage & Backpack Presets
🎒 Soft Bag Packing Level 85% 15% empty squeeze tolerance
60% (squishable daypack) 80% (standard travel pack) 100% (stuffed solid)
💡
🧳 Overhead Carry-On Fit --%
0 / 172 airlines accept Primary overhead cage
🎒 Under-Seat Personal Item Fit --%
0 / 172 airlines accept Under seat in front
常见问题解答 (FAQ)
How do airline sizer boxes work at the airport?
Airlines place physical metal sizer boxes at check-in and departure gates. If your bag cannot slide inside without excessive force (including wheels and handles), you may be forced to pay a gate-check fee.
What is the standard carry-on size for US and Canadian flights?
The most common domestic carry-on size is 22 × 14 × 9 inches (56 × 36 × 23 cm). Southwest and some international carriers allow slightly larger dimensions.