American airlines you can have a max linear measurement of 45" for carry on. So you just total up lxwxh and if it's below 45" your good. Personal item you can have a max of 36".
By MNM on March 3, 2017

I have never see luggage scratch so easily. I had been traveling for the past 10 years on planes, 3 times a week. I received this set of luggage as a retirement gift and am truly sorry I did not pick something else and purchase my own luggage. I would not recommend it to anyone.
By Amazon Customer on May 17, 2019

How could the answer be yes when it exceeds 62 linear inches, which on Untied is a $200 penalty charge on top of the regular luggage fee, twice the price of this luggage for a one-way trip? For the 28, outside dimensions per Amazon are OVERALL Dimensions: 31.0" x 20.0" x 12.75", Weight: 11.5 lbs. = 63.75. United and … see more How could the answer be yes when it exceeds 62 linear inches, which on Untied is a $200 penalty charge on top of the regular luggage fee, twice the price of this luggage for a one-way trip? For the 28, outside dimensions per Amazon are OVERALL Dimensions: 31.0" x 20.0" x 12.75", Weight: 11.5 lbs. = 63.75. United and other airlines allow 62" max. see less How could the answer be yes when it exceeds 62 linear inches, which on Untied is a $200 penalty charge on top of the regular luggage fee, twice the price of this luggage for a one-way trip? For the 28, outside dimensions per Amazon are OVERALL Dimensions: 31.0" x 20.0" x 12.75", Weight: 11.5 lbs. = 63.75. United and other airlines allow 62" max.
By Truth on July 31, 2020

Yes they fit very well inside one another for easy storage. The luggage has more than ample space to put all you need in it for a week vacation.
By brown sugar on February 10, 2015