I fold the legs together (fold along the zipper, basically) and put them through the hole, which folds them again roughly above the knee.

There's very little room left on the hangar when I do that. Just like in that site's method.

So given a regular hanger will have ~10% of the hanger left empty with pants on it, and the new hanger cuts the continuous length down by 40%, I don't see how it'll be wide enough. Maybe her small person pants fit, but it doesn't seem like mine would.