Checked Luggage Size Guide
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62 linear inches means length plus width plus height added together, and it is the standard maximum size for a checked bag on most airlines. Stay at or under 62 linear inches and 50 pounds and a standard-fare checked bag flies without oversize or overweight fees on most US carriers. This guide explains how to measure, what the size classes mean, and where the fee traps are.
What linear inches means and how to measure
Airlines use one number instead of three because cargo holds care about total bulk, not shape. A 30 x 20 x 12 bag and a 28 x 22 x 12 bag take similar space, and both come to 62 linear inches.
Measure it yourself rather than trusting the product listing:
- Stand the bag as it rolls, fully closed.
- Measure height from the floor to the highest point, including wheels and any fixed top handle.
- Measure width at the widest point, including side handles and trim.
- Measure depth at the deepest point, including wheel housings and any front bulge when packed.
- Add the three numbers.
The two common mistakes both flatter the bag: skipping the wheels, which add 1.5 to 2 inches, and measuring the empty shell when a packed soft-side bag bulges an inch or more. Airlines measure the object in front of them, wheels, handles, bulge and all. Manufacturers often advertise the shell size, so a "29-inch" suitcase can measure 31 inches at the airport. Measure packed, with a tape, before you buy a ticket around the number on the listing.
The standard allowance on US airlines
On most US carriers, a standard-fare checked bag may be up to 62 linear inches and 50 pounds. Above those numbers, fees step up sharply:
- Overweight: typically kicks in above 50 lb, with a second, higher tier around 70 lb. Fees commonly run from around $75 to $200 per bag, per direction.
- Oversize: typically kicks in above 62 linear inches, up to a hard cap around 80 to 115 linear inches depending on the airline. Fees commonly run from around $100 to $200 per bag, per direction.
- Both at once: a bag that is both oversize and overweight can be charged both fees on some carriers, which can exceed the price of the suitcase.
Premium cabins and elite status often raise the weight limit to 70 lb but usually not the size limit. Fees vary by airline, route, and fare class, and they change often, so verify on the airline's site before you fly. The pattern that does not change: the base allowance is roomy, and the penalties for exceeding it are steep.
Checked luggage size classes
Retail sizing is loose, but checked bags cluster into recognizable classes:
| Class | Typical height | Typical linear inches | Best for |
|---|---|---|---|
| Carry-on | 21 to 22 in | 45 or less | Cabin, 1 week or less |
| Medium checked | 25 to 27 in | 55 to 60 | 1 to 2 weeks, one traveler |
| Large checked | 28 to 29 in | 60 to 62 | 2 plus weeks, families, bulky gear |
| Oversize | 30 in and up | Over 62 | Sports equipment, always fees |
Those totals assume typical proportions; a wide or deep bag can push a 27-inch case past 60 linear inches, which is why you add the three numbers instead of trusting the height label.
Medium checked (25 to 27 inches) is the practical default for one person. It clears 62 linear inches with room to spare, holds a two-week wardrobe, and is hard to pack past 50 pounds with normal clothing.
Large checked (28 to 29 inches) is the biggest class that reliably stays legal. It sits close to the limit, so measurement accuracy starts to matter, and it is big enough that weight becomes the binding constraint before space does.
Why 28 inches usually clears and 30 to 32 usually does not
A typical 28-inch case measures around 28 x 20 x 12, which is 60 linear inches: under the limit with a small margin for wheels and bulge. Move to a 30-inch case at around 30 x 21 x 13 and you are at 64 linear inches, already over. At 32 inches, there is no realistic set of proportions that stays under 62.
That makes 28 to 29 inches the practical ceiling for fee-free checking on most airlines. Retailers sell 30-inch and 32-inch suitcases anyway, often without mentioning that they exceed standard airline limits, and the oversize fee arrives as a surprise at the counter. If a listing does not state the linear-inch total including wheels, assume the worst and measure.
The weight trap of big luggage
Size and weight limits interact, and the bigger the case, the more the 50-pound limit does the enforcing. A large empty suitcase invites you to fill it, and a fully packed 28-inch case can pass 50 pounds with dense contents like shoes, books, or gifts long before it runs out of room.
The empty case is part of the math. Typical empty weights for checked sizes, by category: soft-side cases run roughly 7 to 10 lb, polycarbonate hard shells roughly 9 to 12 lb, and aluminum cases roughly 12 to 15 lb. Those are category ranges, not specs for any particular case. On a 50-pound allowance, the case itself consumes 15 to 30 percent of the budget before you pack a sock. Heavier shells buy protection; the trade is fewer pounds of contents, and knowing the trade beats discovering it at the counter. Weigh the packed bag at home on a bathroom scale: weigh yourself, weigh yourself holding the bag, subtract.
Check it or carry it on
Once you know the limits, the real question is whether to check a bag at all. Checking buys volume and frees your hands; carrying on buys time at both ends and removes the risk of a lost bag. The full decision framework, fees included, is in checked vs carry-on, and the cabin-side rules live in the carry-on size guide and carry-on weight limits.
It also changes what you should buy. Most travelers reach for the matched three-piece set by default, then use one piece per trip. A single well-chosen case, sized to how you actually travel, usually serves better than a set sized to a showroom. That argument gets its own page: one case vs a luggage set.
Common questions
Is 62 linear inches strictly enforced?
Enforcement varies. Many agents eyeball obviously normal suitcases and only tape-measure bags that look big, so a 63-inch bag may slide through one counter and get flagged at the next. But the downside is not symmetric: when it is caught, the oversize fee is typically $100 to $200 per direction, and you have no leverage at the counter. Do not gamble a round-trip's worth of fees on a lenient agent; buy a bag that measures under 62 including wheels.
What happens if my bag is overweight at the counter?
You get two options: pay the overweight fee or fix it on the spot. Fixing it means opening the case at the counter and moving weight into your carry-on, your personal item, or a travel partner's bag, or wearing the heavy jacket and boots. Agents see this constantly; it is not embarrassing, but it is avoidable. Weigh at home the night before, and leave a few pounds of margin for the return leg, when souvenirs come home in the same case.
What is the largest suitcase I can check?
Without fees, the largest practical answer is a 28 to 29-inch case that totals under 62 linear inches. With oversize fees, most airlines accept bags up to somewhere between 80 and 115 linear inches depending on the carrier, and beyond that you are into cargo or freight services. For sports equipment like skis, bikes, and surfboards, check the airline's equipment policy first; many have flat fees for specific gear that beat the generic oversize charge.
All numbers here are the widely published standards as of 2026. Allowances and fees change and vary by airline, route, and fare, so the airline's own site is the final word before any trip.
Start with the bag that never gets checked
Whatever you check, the bag that earns a permanent place is the one that flies in the cabin every trip. The TALO Cabin is a ribbed aluminum carry-on built to standard cabin sizing for the major US airlines, with TSA-approved frame latches instead of zippers and silent spinner wheels. Buy the checked piece for the trips that need one; buy the cabin piece once.
