GANSSIA Colorful Compasses Math Geometry Tool Set - 8 Pieces Colored Pink Maximum Circle Radius: Approx. 5.43" (13.8cm) Case Size: 6.41"*2.64"*0.94" Plastic durable case to protect and keep tools in one place in a backpack or desk. Great math tool set for student, plastic storage case convenience for carry. Math Geometry Kit Set containing 8 pieces: Compass, lead refills, mechanical pencil, eraser, ruler, 180 protractor, 45-90-45 degree triangle and 30-60-90 degree triangle.