Wire Gauge Conversion Chart

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The gauge of a wire is a measure of its thickness. Confusingly the lower the gauge of the wire the thicker it is. A 12 gauge wire is thicker than a 20 gauge wire.

In this country we refer to the thickness of wire in millimetres, whereas in the USA they refer to it by gauge. I often find it hard to flip between the two when I am reading American bead magazines so I use the wire gauge conversion chart below.

Jewellery Wire Conversion Chart
Gauge Approximate Diameter
(in Millimetres)
12 2mm
14 1.5mm
16 1.25mm
18 1mm
20 0.8mm
22 0.6mm
24 0.5mm
26 0.4mm
28 0.3mm

Guide to which wire to use for which project.

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