I am fairly short - so I can't help with actual sizes -but I can say that I think you should ride several different bikes - even if you know your size. I tried specialized elite dolce, bianchi eros donna, trek pilot 2.1, a lemond, a cannondale, a raliegh - all within a couple of cms of each other. I rode a 44 cm bianchi imola that was too long of a reach for me - I ended up with a 47 cm scott wsd - contessa roadster - felt much better. Just going by measurement - the 44 should have worked - but, even with switching out the stem - it just was not as comfortable for me. So - I suggest actually trying a few differnent sizes and companies before deciding.