Save your money and go with another company. I've flown multiple years with RyanAir with the same suitcase, and now all of a sudden, they decided it was half a centimeter too big (fit perfectly in the rack, just a bit of the wheel was outside of it) and made me pay 75 pounds, after I paid extra for my bag and priority boarding. Still took the bag in the overhead compartment where it fit with plenty of space to spare, on an almost empty flight. Well done RyanAir, really great business model for a returning customer! Needless to say this is the last cent they will ever get from me and my friends. Standardise your back checks or stop scamming people.