Hemming is a sewing technique used to finish the edges of fabric to prevent fraying and to create a clean, polished look. It involves folding the edge of the fabric over and stitching it down, which can be done by hand or with a sewing machine. Hemming is commonly used in garments, curtains, and other textile items. There are various types of hems, including blind hems, rolled hems, and double-fold hems, each serving different purposes and aesthetics. The choice of hem type often depends on the fabric used and the desired finish, making it an essential skill in sewing and garment construction.