some sizing charts go by size 5'6" and...
some sizing charts go by size 5'6" and some go by wieght 165?wich one is best
It really depends on how big your feet are. If you are pushing size 10 1/2 and up it maybe a good idea into the wide option, in that case you should look into the 157. If your feet are smaller, or you don't mind the toe drag, and depending on your riding style, the 56 or 59 should suit you quite well.