12" School Ruler 1/2" Scale 10363 73577-10363 - Westcottr Rulers - Westcottr has been a trusted name since 1872. We use only select hardwoods. Numeralsand graduations are sharply delineated. Edges are straight and true. Protective lacquerfinishes are clear and durable. We work carefully every day to make sure our productsmeasure up.