The hem is the finished edge of a garment. It prevents fabric from fraying and gives the piece a clean bottom line. Hems appear on dresses, skirts, trousers, shirts, and sleeves. The width and finish vary. A narrow hem suits lightweight fabric. A deep hem adds weight and drape. A blind hem is nearly invisible from the outside. A rolled hem is common on silk and chiffon.

Hemming is one of the most common alterations. A garment that fits well everywhere else may still need its hem adjusted. Trousers are often hemmed to break properly over shoes. Dresses may be shortened to suit the wearer's height. Skirt lengths change with fashion, and a good tailor can adapt older pieces to current tastes. The cost is modest compared with buying new.

Construction techniques differ by fabric. Woven fabrics can be turned under and stitched. Knits often use a cover stitch or a twin needle to allow stretch. Delicate fabrics may use a rolled hem on a serger. Leather and suede are usually glued or skived rather than sewn. The hem can also be a design feature. Contrasting thread, a wide band of fabric, or a lace trim can turn a simple edge into a statement. The hem is the last step in construction and often the most visible.

Common types

• Straight hem
• Blind hem
• Rolled hem
• Narrow hem
• Contrast or banded hem