i have a bag that big, that's before i let out the zipper expando. it is a discontinued AA bag that was sold at Marshalls for under $100. i have a full set of unmatching color AA bags that are all too big.
the bag has been to europe at least 20 times. never been attack with a tape measure.
for carryons, the stuff those guys carry onto AA on monday am on the dfw-dca flight may not pass the 62" test. cannot believe what is allowed.