IRCHLYN Mini Outdoor Plastic Magnifier: Student Outdoor Exploring Classroom Easy Teaching Science Observation Color: Transparent Material: plexiglass + plastic Length: 11cm (4.3n) Large lens diameter: 4.5cm (1.8in) Small lens diameter: 1.5cm (0.59in) Magnifying Power Large lens: 5X Small lens: 15X Packaging includes: 24pcs Plastic Magnifier Note: Keep away from the sun, so as not to cause fire. Children should be accompanied by adults in the sun. Please allow 1-3cm error due to manual measurement.