This portable and multifunctional ruler is 9cm long but when it is extended, its length is 16 cm. The little winder in the middle let you also read the angle easily aswell as the see through material.
In addition, there are small holes are placed every 1 cm, making it convenient for you to mark points on paper. When extending, the ruler arms will stop in place every 15°.
Material: transparent plastic
Size: 16 cm (open)