I've got probably a stupid question. We're going to Rome and on to Florence and Lucca in June. We're traveling with 2 of us, my wife and I, and are traveling by train within Italy. We're trying to make the trip with 2 carry-ons and no checked baggage. We're flying on British Airways from the US, so we're allowed only 1 carry-on each. The dimensions they list are 22X18X10 in. bags. So, here is my potentially dumb question. How do they measure those? Does it include the wheels, handle, etc.? We want to try and get as big a bag as we can and yet still carry it on. Any thoughts or help would be appreciated. We do have the air tight bags which will be a help, and we're limiting what we bring, but still will be incredibly tight. I can't seem to find out info. on how they measure on BA's sight. Thanks.