Check in luggage size: the limits Australian airlines actually apply

The size limit is a sum, not three separate maximums

Qantas states the rule plainly on its checked baggage page: the total dimensions for each piece cannot be more than the published figure, and it gives a worked example of a bag measuring 56 cm in height, 34 cm in width and 23 cm in depth, which adds to 113 cm and therefore sits comfortably under the domestic limit. Virgin Australia expresses the same idea as length plus width plus height, and asks travellers to add the three figures before arriving at the airport.

Because it is a sum, the shape of a case matters as much as its capacity. Two suitcases holding a similar amount of clothing can fall on opposite sides of the line if one is tall and narrow and the other is deep and square. The sum also means there is no single dimension you can rely on: a case advertised by height alone tells you nothing about whether it complies, because the width and the depth are doing the rest of the arithmetic.

One more consequence follows from how airlines measure. The figure is an external measurement of the item as presented at the counter, which means wheels, feet, handles, external pockets and anything strapped to the outside are part of the sum. A packed case also bulges, particularly a soft-sided one with an expansion zip, and that bulge is in the measurement as well. Measure the case as you will actually hand it over, not as it sits empty in a wardrobe.

• Add length, width and depth together and compare the sum to the published limit.
• Measure the outside of the case, including wheels, feet and fixed handles.
• Measure after packing, since a full case and an engaged expansion zip both add to the sum.
• Ignore marketing capacity figures in litres; no airline limit is expressed that way.

Domestic and international are two different numbers

The limit changes with the route, not just with the airline. Qantas publishes separate figures under separate headings: for Australian domestic flights the total dimensions for each piece cannot be more than 140 cm, described on the same page as 55 in, while for international flights the total cannot be more than 158 cm, described as 62 in. The page illustrates the international figure with a case of 76 cm by 52 cm by 29 cm, totalling 157 cm and therefore inside the limit.

Virgin Australia publishes a total of 140 cm, again given as 55 in, and asks passengers to add the width, height and depth of the bag to check. The practical effect is that a case bought against the international figure may be oversized on a domestic sector, which is exactly the trap in an itinerary that starts with a domestic feeder flight and continues overseas.

This is also why a large case is a route decision rather than a general-purpose purchase. If most of your flying is domestic, sizing to the larger international figure buys capacity you cannot use on the flights you actually take. If you fly long-haul rarely, the sensible approach is to size the case you own to the limit you meet most often and solve the occasional larger trip some other way.

Weight is a separate limit, and it applies per piece

Size and weight are independent tests, and a case can pass one and fail the other. Qantas sets out allowances that commonly run to 23 kg, given also as 50 lb, for lower fare types and 32 kg, given also as 70 lb, for others, while repeating across the page that no single piece may be greater than 32 kg even where a total allowance is higher. Virgin Australia describes standard pieces at 23 kg, applies an overweight charge to pieces between 23 kg and 32 kg, and states that anything heavier than 32 kg must be shipped as freight rather than carried as baggage.

The 32 kg ceiling is the one that will not bend, because it exists for handling and workplace safety reasons rather than as a revenue measure. Splitting a heavy load across two compliant pieces is therefore a different proposition from paying an excess fee on one heavy piece: the first is usually permitted within your piece allowance, the second may not be permitted at all.

For a buying decision, this makes the empty weight of the case itself a live number. Every kilogram of shell, frame and wheels is a kilogram you cannot fill with clothing inside a fixed allowance, and it is paid on every single trip rather than once. Manufacturers publish empty weight on their specification pages; it is worth comparing that figure across candidates with the same external sum, because capacity and weight do not move together.

Pieces or total weight: which system your route uses

Australian carriers do not apply a single accounting system worldwide, and the difference changes how you pack. Qantas explains that the allowance is based on the number of pieces you can check for domestic Australian flights and for international flights to North or South America, whereas for international flights outside those regions the allowance is based on total weight, so you may check as many items as you like provided their combined weight stays within the allowance.

Under a piece system, an extra bag is the thing that costs you, so consolidating into fewer compliant cases is the right strategy. Under a weight system, the number of bags matters much less and every gram of empty case weight counts against you directly, which rewards lighter luggage and penalises heavy hard shells. The same two suitcases can be the right or wrong choice purely on which system your ticket falls under.

Mixed itineraries need one extra check. Qantas notes that for an international multiple-sector journey the allowance of the first carrier usually applies, sometimes described as the most significant carrier, and that its international allowance can apply to the domestic flights in the same booking under stated conditions. Read that section for your specific routing instead of assuming the domestic rule governs the domestic leg.

Measuring a case you already own, and packing it to the limit

Stand the packed case upright on a hard floor and take three measurements with a rigid tape. Height from the floor to the highest fixed point, which usually means the top of the retracted handle rather than the lid. Width at the widest point, including any side handles or protruding feet. Depth at the deepest point, including the wheel housings and any packed-out front pocket. Add the three and compare the sum to the published limit for your route, then weigh the case on bathroom scales and note both figures somewhere you will find them again.

If the sum comes out close to the limit, the quickest reduction is almost always in the depth. Unzipping an expansion panel can push a compliant case over on its own, and over-packing the front pocket does the same thing. Packing flat, with heavier items in the base and smaller pieces laid along one side, keeps the profile square and stops the lid from doming, which is what pushes the depth measurement up.

Finally, measure before the return journey as well as before departure. Souvenirs, gifts and anything bought at the destination change both the sum and the weight, and the inbound flight may well have a different limit from the outbound one if the routing mixes domestic and international sectors. A small luggage scale and a note of the two published figures remove almost all of that risk.

• Measure height to the top of the retracted handle, not to the lid.
• Include wheel housings in the depth and side handles in the width.
• Keep the expansion zip closed when the sum is close to the limit.
• Weigh each piece separately, because the ceiling applies per piece.
• Record the route's size and weight figures before you pack for the return leg.

What to confirm before you rely on any figure

Baggage rules are commercial terms, and they change. The figures above are what the two carriers published on their own checked baggage pages on the date this guide was checked, and they are stated for named routes and fare groups rather than as universal truths. Allowances also move with fare type, frequent flyer status, partner operation and codeshare, and a flight sold by one airline may be operated by another with different handling.

So treat the carrier's own baggage page as the authority for your booking, and read it after you have chosen the fare rather than before. The industry's baggage documentation, published by the International Air Transport Association, is useful background on how checked bags are handled and tracked between carriers, but the number that applies to you is the one on the page for your route and ticket.

For a purchase decision, that suggests a simple rule. Buy to the limit you will meet most often, keep a written note of your case's external sum and empty weight, and re-read the airline page before each trip that is different from your last one. The measurement of your case will not change; the limit it is measured against may.

Before you buy

• Route identified as domestic or international before comparing any figure
• Fare type and status checked against the carrier's published allowance table
• Whether the allowance is counted in pieces or total weight confirmed
• Case measured packed, as a sum of length plus width plus depth
• Wheels, feet, side handles and retracted handle included in the measurement
• Each piece weighed separately against the 32 kg ceiling
• Empty weight of the case read off the manufacturer's specification
• Return leg re-measured and re-weighed before the inbound flight

Questions readers ask

Is check in luggage size measured as three separate dimensions?

No. Both Qantas and Virgin Australia publish it as a single total: add length, width and depth and compare the sum to the limit. Qantas gives 140 cm for Australian domestic flights and 158 cm for international flights, and Virgin Australia gives 140 cm.

Do wheels and handles count towards the measurement?

They are part of the external size of the item you present at the counter, so measure to the outside of the wheel housings and to the top of the retracted handle. A packed case with an engaged expansion zip should be measured in that state.

What happens if a bag is over 32 kg?

Virgin Australia states that anything heavier than 32 kg must be shipped as freight rather than carried as checked baggage, and Qantas repeats that no single piece may be greater than 32 kg. Splitting the load across two compliant pieces is the usual answer.

Why would my allowance be counted in weight rather than pieces?

Qantas counts pieces for Australian domestic flights and for international flights to North and South America, and counts total weight for international flights to the rest of the world. Which system applies changes whether extra bags or heavier bags cost you.

Should I buy a case sized to the international limit?

Only if you fly international routes often. A case sized to 158 cm can be oversized on a 140 cm domestic sector, so sizing to the limit you meet most often avoids carrying capacity you cannot use.

Sources

1. Qantas — Checked baggage: dimensions and allowances — checked 2026-11-06
2. Virgin Australia — Checked baggage — checked 2026-11-06
3. IATA — Checked baggage programme and handling standards — checked 2026-11-06