This is only semi related, but last week I had a certain airline drop my Red Oxx Airboss into the bag size template, and the gate agent deemed that the bag was oversized because it would not "easily fit." It was not overpacked (or even close) and would have easily fit if he had pushed down slightly on the bag, since it is soft sided and wasn't the right shape when he dropped it in.

I went along with it with a smile because there is no use arguing, but it was pretty silly. The bag had to be gate checked.