Personal item vs carry-on
Know which bag usually goes under the seat and which one normally goes overhead.
Guides
Learn what to measure, which bag type to choose, and what to verify before trusting a cabin baggage result.

Packing checklist
Before you compare
Pack the bag first, then measure it.
Measure the widest length, width, and height.
Include wheels, handles, straps, pockets, and bulges.
Check whether your fare includes the selected bag type.
Open the official source before you fly.
Know which bag usually goes under the seat and which one normally goes overhead.
Include wheels, handles, side pockets, and the shape your bag has when it is full.
A bag can match dimensions but still require priority, a bundle, or a paid cabin bag.
Use CabinFit as a planning tool, then confirm the airline page before travel.
In-depth guides

Measuring guide
Measure your carry-on or personal item the way airlines do: outside dimensions including wheels and handles, inches or centimeters, and every orientation.

Bag types explained
Understand the difference between a personal item and a carry-on bag: typical sizes, where each one goes, and which bags fit which category.

Fares and baggage
Basic and economy fares often limit you to a personal item only. Learn how fare classes change your baggage allowance and how to avoid surprise gate fees.

Trust and verification
Baggage rules change and third-party charts go stale. Learn how to confirm carry-on and personal-item limits from official sources and read last-checked dates.
Bag types
Personal items usually fit under the seat. Carry-ons usually go in the overhead bin and may depend on fare bundles, aircraft, boarding group, or paid add-ons.

Usually under the seat

Usually overhead bin
Measurement guide
CabinFit compares the numbers you enter. It does not assume a soft bag will compress or ignore wheels, handles, or pockets that stick out.
Orientation check
Airlines and bag brands do not always list dimensions in the same order. CabinFit checks all six orientations before showing a result.
Next step
Check one airline, compare the same bag across all rules, or build a multi-airline trip plan.