Convert mm to Inches

Use the chart and image below to convert mm to inches and approximate lengths.

mm	Inches	Inches
1	0.04	1/32 inch
2	0.08	1/16 inch
3	0.12	3/32 inch
4	0.16	1/8 inch
5	0.20	3/16 inch
6	0.24	Just under 1/4 inch
7	0.28	Just over 1/4 inch
8	0.31	5/16 inch
9	0.35	Just under 3/8 inch
10	0.39	Just over 3/8 inch
11	0.43	7/16 inch
12	0.47	Just under 1/2 inch
13	0.51	Just over 1/2 inch
14	0.55	9/16 inch
15	0.59	Just under 5/8 inch
16	0.63	5/8 inch
17	0.67	Just under 11/16 inch
18	0.71	Just over 3/4 inch
19	0.75	Just over 3/5 inch
20	0.79	Just under 13/16 inch
21	0.83	Just over 13/16 inch
22	0.87	Just under 7/8 inch
23	0.91	Just over 7/8 inch
24	0.94	15/16 inch
25	0.98	1 inch
26	1.02	1 and 1/32 inch
27	1.06	1 and 1/16 inch
28	1.10	1 and 3/32 inch
29	1.14	1 and1/8 inch
30	1.18	1 and 3/16 inch
31	1.22	Just under 1 and 1/4 inch
32	1.26	Just over 1 and 1/4 inch
33	1.30	1 and 5/16 inch
34	1.34	Just under 1 and 3/8 inch
35	1.38	Just over 1 and 3/8 inch
36	1.42	1 and7/16 inch
37	1.46	Just under 1 and 1/2 inch
38	1.50	Just over 1 and 1/2 inch
39	1.54	1 and 9/16 inch
40	1.57	Just under 1 and 5/8 inch
41	1.61	1 and 5/8 inch
42	1.65	Just under 1 and 11/16 inch
43	1.69	Just under 1 and 3/4 inch
44	1.73	Just over 1 and 3/5 inch
45	1.77	Just under 1 and 13/16 inch
46	1.81	Just over 1and 13/16 inch
47	1.85	Just under 1 and 7/8 inch
48	1.89	Just over 1 and 7/8 inch
49	1.93	1 and 15/16 inch
50	1.97	2 inches

For comparison purposes, here are the Thickness measurements of some common US coins:

In order To get clearer understanding of how thick or wide is a piece of jewelry, you can use US coins for reference. For thicker items you can stack multiple coins to acquire the approximate thickness or the width of your selected jewelry.

Dime Thickness is 1.35mm and Diameter is 17.9mm
Penny Thickness is 1.55mm and Diameter is 19.05mm
Nickel Thickness is 1.95mm and Diameter is 21.21mm
Quarter Thickness is 1.75mm and Diameter is 24.26mm