Fold the pants together and cut both legs off just under the knee. This isn't the final cut, so don't worry about uneven hems or imperfect cuts.

Try them on and cuff each leg to the desired length. Take them off, smooth onto a flat surface, aligning all the seams and hems, then snip across in even cuts.

Gather the new hem and rub to loosen threads. Pull out or snip any long strands. Toss them in the washer for a soft, frayed edge.