Material：Folding rulers are made of high quality plastic, durable and lightweight, can avert scratching the finger Size: The straight rulers are 30 cm/12 in total length, after folding up is 15 cm/6 in, convenient to carry and stored in pencil case or school bag Design: Transparent design with clear centimeters scale, easy to measuring and convenient to read the scale, long enough for you to measure things in your daily objects Function: 30cm transparent ruler can draw straight lines, square, triangle and other patterns, suitable for school, home, library, study room Quantity: 4 pcs plastic folding ruler, sufficient quantity and diverse colors can meet your daily usages while working and studying, and you can share with your friends, classmates and colleagues, Manufacturer: Karjiaja