Features: This teacher maths tools containing a teaching ruler, compass, and protractor provides a comprehensive set for teachers. You can also send them out as gifts. The jumbo teaching ruler set have been crafted to suit various needs and produce accurate results. Specifications: Material: PP Color: yellow Size: Teaching ruler: about 19.69 inches/ 50 cm Teaching compass: about 16.93 inches/ 43 cm Teaching protractor: about 17.72 inches/ 45 cm Package includes: 1 x Teaching ruler 1 x Teaching compass 1 x Teaching protractor Notes: Manual measurement, please allow slight errors on size. The color may exist a slight difference due to different screen displays.