To hem a piece of cloth (in sewing), a garment workerfolds up a cut edge, folds it up again, and then sews it down. The process of hemming thus completely encloses the cut edge in cloth, so that it cannot ravel. A hem is also the edge of cloth treated in this manner. The hem may be sewn down with a line of invisible hem-stitch or blind-stitch or sewn down by a sewing machine, usually leaving a visible line of sewing. Modern sewing machines can make many decorative or functional stitches, so the number of possible hem treatments is large. Machines can also sew a reasonable facsimile of a hem-stitch, though the stitches will usually be larger and more visible. Most haute couture hems are sewn by hand for this reason. Heavy material with deep hems may be hemmed with what is called a dress-maker's hem — an extra line of loose running stitch is added in the middle of the hem, so that all

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