Hi to all the lovely people on this amazing forum. Well i'm considering getting a Damier Azur Keepall for travelling.well anyways.. i want a carry on bag and i am having trouble deciding between the Keepall 50 and 55. I know that the dimension for 50 is 20X11X9 and 55 is 22X12X9.. well i'm just having trouble imagining these sizes in my head. Will they both be allowed on the plane as carry on or do you think the 55 too big? Thanks in advance!