I'm very new to LV and in the exact same dilemma as tweeety, thanks for the insight LApursenurse - it definitely confirmed my assumption on size Would you consider the 50 with out Bandouliere or would it also be too heavy?I would definitely get one with a strap. I purchased a 55B last year and have travelled with it out if the country. In retrospect, I wish I would have gotten the 50B. The 55 was larger than I expected and got quite heavy. I had no problem using it as a carry on.