Dritz: see-thru dressmaker’s ruler.Use this tool for more accurate markings on your fabric projects.The tool has parallel slots for precision markings from 1/4 to 3-3/8 inches.Use this for simplifying pattern alterations, to measure and mark exact location of buttons, pockets, and buttonholes, to guide a tracing wheel and more.This package contains one 4×15 inch ruler.Made in usa.