Hi Tom, Back in the old days when a woman's dress covered her all the way to the ground, feet were more 'exciting' than they are today. The poets would extol the beauty of a shapely foot or a finely turned ankle. Granted this was probably a polite way of saying they found the rest of the person shapely as well but were too discreet to say so.
In some non-English cultures, small feet are looked upon as a mark of beauty--in a woman at least. So, yes, a foot can be described as shapely. The same could be true of hands but in BrE i have seen it more often as: She had fine hands with long slender fingers.