What material does a seam gauge typically measure?

A seam gauge is primarily used to measure the distance for hems. This tool usually features a sliding marker that helps in ensuring that hems are consistent in width, an essential aspect of sewing and tailoring for achieving a professional look. When creating hems, precision is key for an even finish, and a seam gauge allows the user to set the desired measurement accurately and easily.

While fabric weight, stitch length, and fabric width are important aspects of sewing, they are not the primary function of a seam gauge. Instead, this tool specifically focuses on the distance from the edge of the fabric to where the hem will be sewn, making it invaluable for tasks that require uniformity in hem sizes across different pieces.