Seed Beads 10/0 Czech Opaque Dark Blue (one hank pack) High quality Czech 10/0 glass seed beads. 10/0 Czech glass seed beads are an ideal bead for weaving, stringing and sewing onto fabric. Slightly bigger than an 11/0 therefore a little easier to use. Use with nymo thread sizes D, B and size 12 English beading needles for weaving and loom work. Approximate pack specifications: 1.4 ounces: hank or hank equivalent of 12x20" strands, 3500 beads.