Finally… a number line designed on the vertical! These number lines with vertical orientation accurately represent numerical value - for example, 4 is lower or less than 5, as 20 is higher or more than 19. Also, because a child can visually scan on a vertical plane before then can on a horizontal plane, this unique design allows them to compute with increased accuracy and speed. Self-adhesive back. Laminated number line is durable and washable. Measures 1-1/2 in. x 13-1/2 in. Grades K-6.