measuring charts layout. scale, ruler with markup and numbers, with 4, 6, 8, 12 inches and 10, 15, 20, 30 centimetre.

ruler inch measure scale cm centimeter graph line mm tapeline tape height 10 metric graphic chart mark feet pattern distance 12 20 meter foot 30 15 set education growth horizontal length math number school tool unit dimension gauge quantity size imperial yardstick calibration icon millimeter tall