A carry-on bag ensures you ... Here's a quick reference for size limits for the most popular US airlines. Alaska Airlines All 55.88 x 35.56 x 22.86 cm; 22 x 14 x 9 in American Airlines All 56 ...
As for carry-on bags, those are an entirely different world of fees and size restrictions – you can find information for major American and international airlines in a separate U.S. News guide ...