Airline carry-on rules: Basically, your carry-on bag must be under 45 linear inches—the total sum of the bag’s length, width, and depth. 

Choose carry-on bags with a removable bag , so taht you can make sure your clothes are hanging properly before you fold it into thirds along the padded bars designed to prevent creases. THis is is not possible with a built-in folder.

Choose two-wheeled carry-ons over four-wheeled carry-ons: They will usually fit better in the overhead bin, and are easier to maneuver.

The best carry-on luggage: Travelpro Platinum Magna 2 (22-inch, high end details and reliability at a great price)

The second best carry-on luggage: Travelpro Crew 10 22″ Suiter (lesser quality, no warranty coverage for airline damage.)

The best affordable carry-on bag: Kirkland Signature Upright 21.5″ Carry-on (Costco) 

The best carry-on upgrade for frequent travellers: Briggs & Riley Baseline International