These magnetic fraction aids color coordinate to one another and with other fraction aids. Made of high quality, no-tear magnetic vinyl. Each set includes 51 pieces total - whole, 1/2, 1/3, 1/4, 1/5, 1/6, 1/8, 1/10 and 1/12's. Instructional Guide. The one or whole measures 12" x 1-1/4" (30.5cm x 3cm). 51 Pieces