miyuki delica 15/0 cylinder seed beads - matte black - dbs0310 5 grams miyuki delica size 15/0 miyuki delica cylinder seed beads and are preferred for delicate bead weaving projects, as well as designs that combine them with larger delica beads and seed beads. they are precision cut and have a large hole size for multiple thread passes. size 15 delica beads measure 1.3mm (diameter) x 1mm with a hole size of .65mm. there are approximately 350 beads per gram and about 25 beads per inch. beads come packaged in a 2 inch plastic tube.