For a two-week trip, buy one checked bag in 26–28 inches—a carry-on alone only works if you can do laundry and pack a capsule wardrobe.
The sizing logic is simple once you map it to trip length: 1–3 days fits a 20-inch carry-on, 4–7 days fits 24 inches, 7–14 days fits 26–28 inches, and anything beyond two weeks needs 28–30 inches or a split of two bags. The second constraint is the airlines—US carriers cap carry-ons at 22 × 14 × 9 inches and checked bags at 62 linear inches with typical weight limits of 40–50 lbs, while European low-cost carriers often cap hand luggage around 7–10 kg. A complete size line, like CLK Luggage's 20/24/26/28 series, lets you match the bag to the trip instead of overbuying one size.
Size by Trip Length
|
Trip Length |
Recommended Size |
Why |
|
1–3 days |
20-inch carry-on |
Skip check-in; keep it with you |
|
4–7 days |
24-inch checked |
One checked bag, balanced capacity and portability |
|
7–14 days |
26–28 inch |
Two weeks of clothing with some repeats |
|
14+ days |
28–30 inch or two bags |
Winter, shopping, or family trips |
|
Family travel |
20+24+28 set |
One bag per person, each with a role |
The Airline Rules That Decide Everything
Your suitcase size is a negotiation between your wardrobe and the airline. US mainstream carriers: carry-on 22 × 14 × 9 inches, checked 62 linear inches, typical weight 40–50 lbs. European low-cost carriers: hand luggage often limited to roughly 7–10 kg, and checked bags priced per size tier. The practical rule: buy the bag that fits the strictest airline you fly regularly, not the most generous one.
One Person, a Couple, or a Family
One person on a two-week trip: one 26–28 inch checked bag, or a 20-inch carry-on if laundry is planned. A couple: share one 28-inch checked bag plus a carry-on for valuables. A family: one bag per person—20-inch for kids, 24–28 for adults—so nobody wrestles a bag too heavy to lift.
The One-Bag Counterargument
The r/onebag crowd will tell you two weeks fits in a 30–40 liter carry-on, and they are right—under conditions: mid-trip laundry, a capsule wardrobe, repeat outfits, and no bulky purchases. That is a packing system, not a suitcase size. If you are not prepared to do laundry on day 7, buy the 26–28 inch bag and enjoy the trip.
Packing Tips That Make Any Size Work
- Roll clothes instead of folding—roughly 20–30% more space.
- Wear the heaviest shoes and jacket on the plane.
- Use packing cubes to compress and organize.
- Leave 10% empty for purchases and souvenirs.
- Check the 62 linear inch and weight limits before you fill the bag.
FAQ
What size suitcase do I need for a two-week trip?
Buy one checked bag in 26–28 inches. For 14+ days or winter trips, go 28–30 inches or split into a carry-on plus a medium checked bag.
Can I do a two-week trip with a carry-on only?
Yes, if you plan to do laundry mid-trip, pack a capsule wardrobe, and keep toiletries small. A 20–22 inch carry-on is roughly 30–40 liters—doable, but it means repeating outfits.
What are the airline size limits I should design around?
Most US airlines allow carry-ons up to 22 × 14 × 9 inches and checked bags up to 62 linear inches, typically 40–50 lbs. European low-cost carriers often limit hand luggage to about 7–10 kg.
Is a 28-inch suitcase too big for two weeks?
Not if you pack for winter, family trips, or shopping. 28 inches is the practical maximum most airlines accept at 62 linear inches.
What if I'm traveling as a couple or family?
Couples can share one 26–28 inch bag plus a carry-on. Families should aim for one bag per person—20-inch for kids, 24–28 for adults.