Description: Featuring clear scale markings that don't fade easily, this math geometry ruler set allows you to measure patterns accurately. Ideal for measuring the length of curved surfaces, such as the circumference of a cup, this math geometry ruler set is very flexible and can be freely bent. It is constructed of plastic material. Each set has one 20cm ruler, a 30 degrees triangle ruler, a 60 degrees triangle ruler and a protractor. It is suitable for classroom, school, office, home, etc. Item Name: Measuring Ruler Set Material: Plastic Features: Stylish, Bendable, Precision Scale Size Details: Length: 20cm/7.87" (Approx.) Notes: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Includes: 1 Set of Measuring Ruler(4Pcs Included)