Units of Measure
The aught system of classifying seed beads is widely used but is often imprecise. The measurements given below for bead diameter are meant to suggest the industry standard but are not absolute-- in fact, variation from one manufacturer to the next may be greater than the variation within a single aught-size of bead.
|
Aught size |
Diameter (mm) |
|
1° |
6.5 |
|
2° |
6.0 |
|
3° |
5.5 |
|
4° |
5.0 |
|
5° |
4.5 |
|
6° |
4.0-4.3 |
|
7° |
3.4-4.0 |
|
8° |
2.5-3.1 |
|
9° |
2.2-2.7 |
|
10° |
2.0-2.3 |
|
11° |
1.8-2.1 |
|
12° |
1.7-1.9 |
|
13° |
1.5-1.7 |
|
14° |
1.4-1.6 |
|
15° |
1.30-1.40 |
|
16° |
1.25-1.35 |
|
17° |
1.2 |
|
18° |
1.15-1.20 |
|
20° |
1.0-1.17 |
|
22° |
1.02 |
|
24° |
0.091 |
Read more about this topic: Seed Bead
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