Originally Posted by
sfogate
Welcome to FT 2much.
You need to beware of the sizing box that is located at certain TSA check points. The "keepers of the line" might force you to return to the check in counter if your bag doesn't fit regardless of the size of the aircraft's overhead bin.
Newark doesn't have them, so far, at least not in terminal C. That's my regular point of departure. I seem to recall something about a sizing box in LAX but it's been awhile since I flew out of there.