Choose luggage by checking seven things in this order: size, wheels, handle, weight, lock, shell, warranty. Size decides whether you board with the bag; the other six decide whether it still works after five years of airports. Most people shop by colour and get this order backwards.
Start with your trips, not the bag
Two questions settle most of the choice: how many times a year will this bag fly, and will you check it? A bag that flies twenty times a year lives a different life from one that goes in the car twice.
The 7-point checklist
| Check | What good looks like | Walk away if |
|---|---|---|
| Size | Exterior size printed with wheels and handles included | Only the body size is listed |
| Wheels | Four double spinner wheels, 50 mm or larger | Thin single wheels at the corners |
| Handle | Twin aluminium tubes, almost no side-to-side play | It rattles when you shake it |
| Weight | Carry-on under 8 lb (3.6 kg) empty | Heavy before you pack anything |
| Lock | Built-in TSA lock on the zipper | A padlock with no TSA marking |
| Shell | Polycarbonate that flexes under thumb pressure | Brittle plastic that creaks |
| Warranty | Names wheels, handle and zipper in writing | "Lifetime" with nothing spelled out |
1. Size: measure the outside, not the label
Sizes are named by an old convention that ignores wheels and handles, so a "20-inch" case measures about 22 inches in the real world — and the gate sizer measures the real thing. Pick the size by trip length, then confirm the exterior measurement with wheels included. Our 20 vs 24 vs 28 size guide maps each size to the trips it fits, and the measuring guide shows how an airline takes that measurement.
2. Wheels: four spinners, and bigger is better
Four wheels let the bag roll upright beside you with no load on your wrist — the difference between walking through a terminal and dragging a bag through it. Then look at the wheel itself: 60–80 mm wheels roll over carpet edges and kerbs that catch smaller ones, and double wheels — two discs side by side — spread the load and survive far longer. Check that the wheels sit in a moulded recess rather than on a flat bracket; recessed wheels are the ones that stay attached.
3. Handle: wobble tells you everything
Extend the handle fully, hold the bag still and try to move it side to side. A few millimetres of play is fine; if it swings like a loose fence post, the tube guides are plastic and they will only get looser. Favour twin aluminium tubes — two tubes resist twisting when the bag is heavily packed — and at least three stop heights. A thin, unlined grip usually signals how the rest of the bag was built.
4. Weight: the empty bag eats your allowance
Every pound of suitcase is a pound you cannot pack. On airlines with a 7–8 kg cabin limit, a 10 lb case leaves barely 5 lb of clothing — which is how people end up checking the bag they bought to carry on. Reasonable targets, empty: a 20-inch under 8 lb (3.6 kg), a 24-inch under 9.5 lb, a 28-inch under 11 lb. Our range runs 7.3 / 8.7 / 9.7 lb at those sizes.
5. Lock and zipper: the two weakest points
If you fly to or through the United States, the lock must be TSA-recognised, or customs can cut it off. A built-in combination lock is tidier than a padlock and cannot be lost. The zipper matters as much: a chunky coil zipper with a metal pull is far harder to force than a fine-toothed one, and on hard shells, a zipper that runs inside a channel is shielded from luggage-belt snags.
6. Shell: hard or soft is a packing question
Hard shells protect fragile contents, shed rain and cannot be overstuffed; soft shells give you outside pockets and squash into tight spaces. Neither is better — it depends what you carry. We set out the trade-offs in hard-shell vs soft-sided carry-on. Either way, press the shell with your thumb: polycarbonate flexes and springs back, cheap plastic creaks and whitens.
7. Warranty: read what is actually covered
A warranty is only worth the parts it names. The failures that actually happen are wheels, handle and zipper — so a five-year warranty that lists all three beats a "lifetime" one that lists none. Two checks before you rely on it: airline damage is almost never covered (that is a claim against the carrier), and return shipping is often on you.
Where your money should go
Two bags at the same price did not spend the money in the same places. The parts that fail are the ones you can test with your hands in ten seconds; the parts that sell are the ones you notice across a shop. Judge the failure points first and treat colour as the last 10%.
Three mistakes that cost the most
- Buying the set for the per-bag discount. You end up paying bag fees for the two cases you never wanted to check.
- Trusting the label over the tape measure. Compliant at home, failed at the gate — the most avoidable fee in travel.
- Skipping the warranty page. Five minutes of reading tells you what the brand expects to break.
Frequently asked questions
What should I look for first when buying luggage?
Size, because it decides whether the bag travels in the cabin or the hold, and everything else follows from that. Then judge the build in order: wheels, handle, weight, lock, shell and warranty.
Are four-wheel suitcases better than two-wheel ones?
For airports, yes — four spinner wheels roll upright beside you with no weight on your wrist and turn in any direction. Two-wheel cases only win on gravel, cobbles or snow, where they do not jam as easily.
Is hard-shell or soft-sided luggage better?
Hard shell for fragile items, rain and overpacking; soft shell for outside pockets and tight spaces. Both last if the wheels, handle and zipper are good — those parts break long before the shell does.
Final takeaway
Handle the bag before you read the price tag — all seven checks take about two minutes. Our hard-shell carry-ons are built to the most widely published airline limit — 22 × 14 × 9 inches, wheels and handles included — with polycarbonate shells, double spinner wheels, twin aluminium handles and a built-in TSA lock.
See the full KYME range on Amazon
3-piece 22 / 26 / 30 hard-side set at Walmart