Good point. There was a thread recently on Flyertalk, I dont have it handy, about them enforcing the carry on requirements, but you should be able to easily measure your new bag and see if it is in fact carry-on sized.
Carry-on Crackdown: United Enforces Bag Size Limit - ABC News
Quote:
|
Passengers are typically allowed one carry-on bag to fit in the overhead bin, which can be no larger than 9 inches by 14 inches by 22 inches
|