My favorite ¾ length sleeve tee-shirt had a portion of the hem come out. I have never mastered the art of sewing tee-shirt material and when I tried to repair it…it did not turn out well.
I decided to rip it out and sew the edge and the hem lines in a zigzag stitch. It covered the stitching lines and kept the hem from fraying.
I used the same stitch on my little black dress to lengthen it.