Those foam balls are lightweight, buoyant, while they are solid and hard, and not easy to fade. Perfect for DIY activities, it can make the children acquire lots of happiness, success, confidence and practical ability. Made of premium polystyrene styrofoam, it is durable and portable. The size of the product is S and L. It is suitable for gift box filling, glass bottles DIY, lazy sofa cushions. Item Name: Mini Ball Material:Polystyrene Styrofoam Size Details: [Our Size S] Diameter: 2mm - 3mm/0.08" - 0.12", Quantity: 5000 Pcs (Approx.) [Our Size L] Diameter: 4mm - 8mm/0.16" - 0.31", Quantity: 600 Pcs (Approx.) Notes: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Includes: 1 Pack of Mini Beads Balls