Take measurements, make precise markings, and more with the Dritz See-Thru Dressmakers Ruler. Made of lightweight plastic, this ruler features parallel slots for making precision markings from 1/4" to 3-3/8" and it can be used to measure and mark exact locations for buttons, buttonholes, and pockets, measure straight of grain from fabric selvages, measure and mark spacing for pleats and tucks, and more. The ruler measures 15". - Dritz See-Thru Dressmakers Ruler.