Quantity: package includes 4 packs plastic ruler, 4 different color available, blue, red, yellow, green, you can refer to our pictures to get the color you need.^2 Measuring scales: centimeter scale is on one edge of the ruler and inch scale is on the other edge; Can meet your different measuring needs.^Durable and sturdy: the plastic straight ruler is made of good quality plastic, durable and sturdy; A good measuring tool, easy and convenient to use.^Colorful rulers: Bright color allows for a clear view of numbers and letters on the page; With the colorful mathematics ruler, you can measure the object easily.^Wide application: a useful measuring tool for artists, designers, architects, engineers, students and so on; Suitable for classroom, school, office, home, etc.