What size suitcase in Litres would be best to fit 30kg of luggage. I know it all depends on what we are packing but just assume it is a general mix of mostly clothes, some shoes and some cosmetics. The ones I was looking at are a 90L or a 112L case. I dont want to get the small one in case I dont get the 30kg in it but I dont want to spend the extra money on the bigger one if I will not reach the 30kg.