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1 . Size Info
Inches to Millimeters
Inches Millimeters
1/16 in. 1.5mm
1/8 in. 3mm
1/4 in 6mm
3/8 in 9mm
1/2 in 12mm
5/8 in 15mm
3/4 in 18.5mm
7/8 in 22mm
1 in 25mm

 

Inches & Millimeters Comparison
JewelryResource
JewelryResource
Please note that this is a close approximation. Screen resolution and monitor size will affect how you view the chart.

 

How Many Beads Per Inch
Bead Size Per Inch 7" 16" 24" 32" 36"
3mm 8.25 57 132 200 265 288
4mm 6.25 43 100 150 200 225
5mm 5.00 35 82 124 160 180
6mm 4.25 28 67 100 132 153
7mm 3.50 24 57 85 114 126
8mm 3.25 22 50 75 100 112
10mm 2.50 18 40 60 80 90
12mm 2.00 15 33 50 66 72
14mm 1.75 13 29 43 56 63
16mm 1.50 11 25 38 50 54
18mm 1.25 10 23 34 45 50
20mm 1.20 8 20 29 38 43
Please note that it allows for the length of your clasp. If you use spacer beads or mix sizes, this chart may not be accurate.

 

Wire Gauge to Inches and Millimeters Conversion Chart
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 1.32
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
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