1. Find a dress of the same color and cut the elastic cuffs.
2. Turn out the sleeves of cotton-padded clothes and let them leak.
3. Put the cut elastic sleeves on the inside of the cotton-padded jacket sleeves.
Sew the side of cotton-padded jacket near the cuff with the same color needle and thread.
5. Turn the cuffs over after sewing.
6. This is a good way to lengthen sleeves and close cuffs.