Gallery › Polystyrene balls Search the gallery Search 1.8 m White Hemisphere A person stands behind a giant white hemisphere with its open side facing the camera. The hemisphere measures 1.8 m across. ← Previous Back to album Next → Planning something similar? Polystyrene Balls and Spheres ↗ Ball Sizes and Construction ↗ Have a project in mind? We’d be happy to help. Discuss Your Project →