These jumbo versions of Cuisenaire Rods are ideal for use on your whiteboard to model math concepts. The largest piece measures 25 cm x 2 cm. The set includes 64 magnetic write-and-wipe pieces for modeling number sense, operations, measurement and early algebra, color-coded to match standard Cuisenaire Rods (sold separately). Size: 28.2 x 15.2 x 1 cm. Ages 5+.