Toho's Aiko beads are the most exacting size available in seed beads. There is approximately 180 beads in a gram and we package them in 5 gram tubes/bags so a tube/bag holds roughly 900 beads. We offer them at a discount by volume so 20 tubes/bag equals a full 100 gram bag and is our deepest discount. The exception to this is the precious metal styles, 10 tubes is the deepest discount as a full bag weighs 50 grams.