Gallery › Polystyrene balls Search the gallery Search White Balls in Three Sizes A person stands beside white polystyrene balls of different diameters. The original set includes 900 mm, 500 mm and 300 mm balls. ← Previous Back to album Next → Planning something similar? Polystyrene Balls and Spheres ↗ Have a project in mind? We’d be happy to help. Discuss Your Project →