Dritz See-Thru Dressmaker's Ruler 4'' x 15'' is a must-have tool in every fabric designer's kit. Accurate numbering on this scale aids in making precise markings from 1/4 to 3-3/8 inches. The scale also features a lightweight plastic material to facilitate parallel markings. It is great for measuring and marking specific locations of buttons, appliques, lace, pockets, buttonholes and can also be used as a tracing wheel guide. A single 4x15-inch transparent ruler is included in this package.