Elf had some pants with a large hole in the knee. I felt it was a design a bit hard to sew a patch onto, so I cut them a bit above the knee. Then I sewed some Hawaiian fabric onto the inside so that it is an inside-out layer beneath the shorts when straightened. Next, I folded the fabric up as if I were making a casing and sewed straight across. This way I break no needles by hemming the denim fabric, and we have a nice contrasting layer on the shorts as well.