Will my carry-on fit?
Enter your packed bag's outside dimensions, including wheels and handles, and compare it with a published airline limit or a custom limit from your itinerary.
How SizeDial checked this
The three bag dimensions and three airline limits are sorted largest-to-smallest so the bag may be rotated. Every outside dimension must fit within the corresponding limit. Wheels, handles, and attachments count when the airline says they do.
Logic version: carry_on@1.1.0
Airline carry-on rules are dimensions, not a universal suitcase size.
American, Delta, JetBlue, and Alaska currently publish a 22 × 14 × 9 inch carry-on limit. Southwest publishes a larger 24 × 16 × 10 inch limit. Your itinerary, aircraft, fare, and partner airline can still matter.
Measure wheels and handles
Published airline limits generally apply to the outside of the bag, not just the fabric shell. Measure wheels, handles, and protruding pockets.
Personal items are less standardized
Some airlines publish numeric personal-item dimensions while others simply require the item to fit under the seat. The checker includes published numeric presets where available and otherwise asks you to enter the airline's stated limit.
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Carry-on sizing FAQ
Does a bag exactly at the limit always get onboard?
No. Aircraft storage, fare restrictions, regional aircraft, gate decisions, and partner-airline rules can still affect what happens. The checker answers the dimensional question, not every baggage-policy question.
Should I measure an expandable bag expanded?
Yes, if you plan to travel with it expanded. Measure the packed configuration that will actually reach the airport.
Airline limits verified September 8, 2026: official baggage guidance from American Airlines, Delta Air Lines, JetBlue, Southwest Airlines, and Alaska Airlines. Policies can change; recheck your operating carrier before travel.