Miyuki Delica Size 8 cylinder bead. These Japanese seed beads are known for their high quality and consistent shape. These are the largest size of the Miyuki Delica beads. They come packaged in a 2.5 inch tube containing 8 grams. Each bead measures 2.5mm by 2.5mm with a 1.5mm hole. There are 30 beads per gram and about 9 beads per inch.