What do you call the edge of a fabric that has been finished by the manufacturer?

The correct term for the edge of a fabric that has been finished by the manufacturer is "selvage." The selvage is the self-finished edge of the fabric that prevents it from unraveling and is typically tightly woven. It runs parallel to the length of the fabric and is created during the weaving process. The purpose of the selvage is functional, as it stabilizes the edge of the fabric and provides a clean finish.

In contrast, a hem refers to the folded and sewn edge at the bottom of a garment or fabric piece that typically prevents fraying and gives a finished look. Trim usually refers to decorative elements added to a garment or fabric, while fringe is a style feature that involves the ends of fabric being cut or woven to create a tassel-like effect, often used for decorative purposes. Understanding these terms helps in identifying various components and finishes in textiles and apparel design.