Jewelry Info & Conversions

Length Conversion

Metric Inches(fraction) Inches(decimal)
4.5 mm 3/16" 0.18
6.0 mm 7/32" 0.24
7.0 mm 9/32" 0.28
8.0 mm 5/16" 0.31
9.0 mm 11/32" 0.35
10.0 mm 13/32" 0.39
11.2 mm 7/16" 0.44
12.0 mm 15/32" 0.47
12.7 mm 1/2" 0.5
14.0 mm 9/16" 0.55
15.0 mm 19/32" 0.59
16.0 mm 5/8" 0.63
18.0 mm 11/16" 0.71
19.0 mm 3/4" 0.75
20.0 mm 25/32" 0.79
22.0 mm 7/8" 0.87
24.0 mm 15/16" 0.94
25.0 mm 1" 0.98
26.0 mm 1.1/32" 1
29.0 mm 1.5/326" 1.1
30.0 mm 1.3/16" 1.2
32.0 mm 1.9/32" 1.3
34.0 mm 1.11/32" 1.4
35.0 mm 1.13/32" 1.4
38.0 mm 1.1/2" 1.5
40.0 mm 1.19/32" 1.6
44.0 mm 1.25/32" 1.7
50.0 mm 2" 2

 

Gauge conversion table

Metric Gauges
0.6 mm 22 ga

0.8 mm

20 ga

1.0 mm

18 ga

1.2 mm

16 ga

1.6 mm

14 ga

2.0 mm

12 ga

2.5 mm

10 ga

3.2 mm

8 ga

4.0 mm

6 ga

5.0 mm

4 ga

6.0 mm

2 ga

8.0 mm

0 ga

10.0 mm

00 ga

 

Thread Patterns

As a rule the 14G internally threaded jewelry on our site is standard size which takes an internal thread pattern of 1.2mm and the 16G takes 0.9mm internal thread pattern. The 18G is not standardized by manufactures and may be 0.8 or 0.9mm internal threading so we don't sell individual tops for 18G as a result. Also the extended threading in our piercers special labrets are not standardized threading and only fit the post it comes with.

Threadless Jewelry - How it works

When you purchase threadless jewelry it may or may not come pre-bent. Usually if it is sold as a 2 pc combo there is already a bend in the pin top, however, it still needs to be checked to ensure it is a tight enough fit.

When you buy a separate top and base you almost surely will have to pre-bend your top pin. 

Either way here is a helpful video that explains how but be warned you must be gentle and always apply pressure from the middle of the top not an end particularly if it is a long design. You must be gentle it is easy to break them if you bend repeatedly or too aggressively and this is not returnable for this reason.

Watch a video on how to bend threadless tops