|Sorry for the poor photo quality.
I mark a pin line on the garment where the hem should fall. If you pin the excess up, pin along what will be the bottom edge. Press hem 1/4" longer than the pin line. Stitch very close to the press line, about 1/8". Cut very close to stitching. It will fold over very easily so you can stitch the rolled hem down.
This works well with chiffon, charmeuse, satin, and taffeta. I find it easier than wrangling with the rolled hem foot and less likely to "miss" spots.
finished top of fabric