I've met women with hands and feet larger than mine. And noses. And wider jaws. And there certainly are women with very straight, thin hips...
I don't believe there is credible evidence that Michelle Obama is a man.
To my knowledge there is a video (The Ellen Degenerate show dance number) where her pants are bunching up at her crotch for a second or two, a whole bunch of photoshopped images (like the image Godtaughtmehow posted) and some cherry picked quotes of Barack referring to a Michael. Then there is the video wherecomedian Joan Rivers accuses her of being a man.
If you look at the whole Ellen video it's clear how loose the pants are and that do all kinds of things around her crotch.
There are also pictures o Michelle Obama as a young girl/woman which show no signs of being forgeries.