E&O Montessori Red Long Rods

10 solid wooden rods painted red, increasing in length from 10 to 100 cm.
Information: The red rods are rods with a square cross-section, varying only in length. The smallest is 10 cm long and the largest is one meter long. Each rod is 1 inch square. By holding the ends of the rods with two hands, the material is designed to give the child a sense of long and short.