They're meant for women with a more "womanly" figure than the usual patterns, most of which are based on various permutations of a Wolfe dressform. Honestly, this is why most clothing doesn't fit--who the he** is shaped like a wooden dressform?
When I was a buyer (years ago) I once went behind the scenes to a bathing suit manufacturer, and met their fit model. She was their "ideal" measurements--which, coincidentally, most closely coresponded to the size 8 Wolfe dressform. Everything larger or smaller was graded from there. Most of the pattern companies do the same thing, although this is beginning to change.
Trish, Liz Claiborne pants might fit you; they are also meant for a more shapely figure than the usual.
Karen Maslowski in Cincinnati