For most 15-16inch long strand.

Bead Size:

4mm about 0.8mm hole, about 95 beads per strand
6mm about 0.8mm hole, about 66 beads per strand
8mm about 1.0mm hole, about 49 beads per strand
10mm about 1.0mm hole, about 39 beads per strand
12mm about 1.2mm hole, about 33 beads per strand