Ventures
Carry-on luggage size guide: what actually fits
Carry-on rules look inconsistent, but almost every airline lands in the same territory: a bag around 55 x 35 to 40 x 20 to 23 cm, with a weight cap that matters more than the dimensions.
The two limits that decide everything
Airlines measure carry-on either as three separate dimensions or as a total linear size — length plus width plus depth. New Zealand carriers commonly use the linear approach, typically around 118 cm total, while most international airlines publish individual dimensions instead.
Weight is the limit that actually gets bags stopped. Around 7 kg per cabin bag is the common cap in this part of the world, and it is enforced far more often than a centimetre of extra depth.
Allowances change by airline, fare class and route, so confirm the current numbers on your airline's own baggage page before you fly.
- Total linear limits: add length + width + depth and compare to the airline's figure
- Wheels and handles count toward the measurement
- Weight caps are usually per bag, and a personal item may be counted separately
- Low-cost carriers weigh cabin bags at the gate more often than full-service airlines
Why 55 x 35 x 23 cm is the safe target
A bag at 55 x 35 x 23 cm sits inside both styles of rule: it is 113 cm linear, and each side is within the dimensions most international carriers publish. Go deeper than about 23 cm and you start failing sizers; go longer than 56 cm and you risk the overhead bin depth on smaller regional aircraft.
The NATOR Bag V1 is designed around 38 x 56 x 25 cm, targeting roughly 40 litres and expandable toward 50 litres, so it suits domestic and long-haul travel rather than being optimised for a single airline.
Packing to the limit without going over
Weight discipline beats clever folding. Compression only reduces volume — it does not reduce mass, and a fully compressed bag can still be over a 7 kg cap.
- Weigh the empty bag first: a heavy shell can consume 3 to 4 kg of your allowance before you pack anything
- Wear the heaviest jacket and shoes rather than packing them
- Keep dense items — chargers, cables, toiletries — in the personal item where allowed
- Leave the expansion zip unopened; expanded bags fail sizers
When a larger case is the better decision
For trips beyond about a week, or any trip involving equipment, a checked case is simpler than fighting a cabin limit. The Nator Full Size is 75 x 48 x 30 cm, roughly 85 to 95 litres, and is engineered around a 23 kg loaded travel weight — the standard checked allowance on most international economy fares.