These water gel beads are made from absorbent polymer and come in a 1kg bag. The 1kg bag is sized at approximately 19 x 15cm, and each water bead is approximately 2.5 - 3mm in diameter. These water beads look beautiful when added to large, clear vases and floral centrepieces, perfect for wedding decoration. These gel beads will grow 100 times their original size when submerged in water.