A good bike fit has to do with so much more than simply your height.... at 4'11" you *probably* will need a 44, but depending on your build you might ride a larger bike.... I have a long enough inseam to ride a 48 - but I have short arms and the reach is waaaaaaaay to long for me on a frame that big (I need a short stem even on the 44) - but that's my story- you could be built very differently than I am, so be sure to go to a shop where they are knowledgeable about bike fit and will be sure to get you on the bike you need.