Measure the object the carrier will see
A suitcase’s body-only measurement can omit the wheel housings, top handle and side pocket. Air France explicitly says its 55 × 35 × 25 cm cabin limit includes pockets, wheels and handles. Measure the closed bag from its most protruding point on each side, with handles in the position they will occupy in the airport.
Do not assume every airline counts the same parts or uses the same measurement order. Keep the source order exactly as written and note whether the axes are labelled. If the policy says only three numbers, preserve them as published; do not silently turn them into “height, width, depth.”
- Extend or fold handles as the carrier instructs.
- Include wheels and protruding pockets when policy says so.
- Measure the bag packed, not only empty.
Apply each kind of limit separately
Three maximum side lengths create a box check; a sum-of-sides limit is a different calculation. For a box limit, compare each of your three measured sides to the listed maximum in a permitted orientation. For a sum rule, add the three measured outer sides. Passing one form does not automatically pass the other.
Example: if a packed suitcase measures 56 × 36 × 23 cm and the limit is 55 × 40 × 23 cm, its second and third sides fit but one side is 1 cm above the first published maximum. Do not swap axes unless the airline permits any orientation. Recheck the actual policy before deciding.
| Published form | Calculation | What it does not show |
|---|---|---|
| Three side caps | Check each measured side | Does not imply an unlisted sum rule |
| Three-side sum | Add the three outside sides | Does not waive any individual cap |
| Under-seat dimensions | Compare loaded shape with each listed maximum | Does not guarantee aircraft-specific space |
Include soft-bag expansion and rigid parts
A soft-sided bag can bulge where its contents press outward. A rigid wheel or handle cannot be compressed. Pack the bag as it will travel, close it without forcing the zipper, then measure the most extended outline. If you use an external strap or clip, determine whether it creates a protrusion the carrier may include.
For a soft personal item, put the intended contents in their actual pockets before measuring. For a roller, test the dimension with wheels upright and any telescoping handle stowed. Keep the measurement record with the ticket’s rule so a marketing label such as “cabin size” does not replace the carrier’s exact limit.
Record a cautious result
Write down the three measurements, which side is which, the packed state, and the official rule checked. If the result is exactly at a published boundary, preserve the source’s “up to” wording and allow a margin for measurement error if you can. A small margin is a planning buffer, not a carrier guarantee.
Finally verify weight, number of pieces, under-seat or overhead storage, fare inclusion and operating carrier. A bag can pass a dimension screen yet exceed a weight cap or be excluded by the ticket. Store the source link and check date because baggage rules can change after purchase.
Sources and check dates
- Air France baggage dimensions and included parts ↗Checked 2026-10-15 · Source published: not stated · Source updated: not stated
- Iberia hand luggage dimensions and weight ↗Checked 2026-10-15 · Source published: not stated · Source updated: not stated
- SAS carry-on dimensions and weight ↗Checked 2026-10-15 · Source published: not stated · Source updated: not stated