Ahh! Products 3mm Micro Virgin Bead Polystyrene Styrofoam Bean Bag Chair Filling, 8 Cubic Feet Perfect to plump up flat bean bag chairs Best bean bag filler: Tested and proven by thousands of people nationwide since 1998 3-4mm wide beads are perfectly smooth and round Better than lumpy pea-sized filler Fills 3-foot empty bean bag (approx..)