I'm not worried really about the weight but mostly about the dimensions. I'm trying to avoid checking in a bag because I'm afraid it's gonna go lost since I'm making a connection. The allowed dimensions are 55cm x 40cm x 20cm (21.6" x 15.7" x 7.8"). However, my baggage that I want to take is 53cm x 36cm x 22 cm. Will that extra 2 cm in depth really make a difference when I bring it on board?