Seed Bead Sizes

Size of the seed bead is indicated by number, for example 9/o. The bigger the number, the smaller the bead. The table below presents the size markings of different beads, and their approximate diameter in mm.

SizeBead diameter ca. (mm)Hole diameter ca. (mm)pcs of beads/10g ca
1/o6.62.040
2/o6.11.650
3/o5.61.355
4/o5.11.275
5/o4.61.1120
6/o4.11.0130
7/o3.50.9210
8/o2.90.8420
9/o2.60.8680
10/o2.30.7910
11/o2.10.61300
12/o1.90.51650
13/o1.70.42900
14/o1.60.43250
15/o1.50.46250