Helpful Guides and Charts for Jewelry & Beads
Standard Necklace Lengths | |
Choker | 16 inches |
Princess | 18 inches |
Matinee | 24 inches |
Opera | 32 inches |
Rope | 48 inches |
Wire Gauge in Inches and Millimeters
Determine the diameter, in inches or millimeters, of wire gauges from 10 to 38 gauge.
Gauge |
Inches |
Millimeters |
10 |
0.102 |
2.59 |
11 |
0.091 |
2.31 |
12 |
0.081 |
2.06 |
13 |
0.072 |
1.83 |
14 |
0.064 |
1.63 |
15 |
0.057 |
1.45 |
16 |
0.052 |
1.29 |
17 |
0.045 |
1.14 |
18 |
0.04 |
1.02 |
19 |
0.036 |
0.91 |
20 |
0.032 |
0.81 |
21 |
0.028 |
0.71 |
22 |
0.025 |
0.64 |
23 |
0.023 |
0.58 |
24 |
0.02 |
0.51 |
25 |
0.0179 |
0.455 |
26 |
0.0159 |
0.404 |
27 |
0.0142 |
0.361 |
28 |
0.0126 |
0.32 |
29 |
0.0113 |
0.287 |
30 |
0.01 |
0.25 |
31 |
0.0089 |
0.226 |
32 |
0.008 |
0.2 |
33 |
0.0071 |
0.18 |
34 |
0.0063 |
0.16 |
35 |
0.0056 |
0.142 |
36 |
0.005 |
0.13 |
37 |
0.0045 |
0.114 |
38 |
0.004 |
0.1 |
Seed Bead Sizes | ||
Aught Size |
mm diameter
|
beads per inch
|
6/0 |
3.30
|
10
|
8/0 |
2.50
|
13
|
9/0 |
2.20
|
15
|
10/0 |
2.00
|
16
|
11/0 |
1.80
|
20
|
13/0 |
1.50
|
27
|
14/0 |
1.40
|
24
|
15/0 |
1.30
|
25
|
Seed beads are sized in aughts, which are different than millimeters. The most popular school of thought of the sizing of seed beads states that the size (6/0) refers to the number of seed beads per inch (6 beads per inch). Another sizing theory is that the size is based on the rod used to make the beads. The larger the number, the smaller the bead (20 is small, 3 is large). |