Jewelry Size Conversion Chart Millimeter MM to Inch

If you have ever purchased or shopped for a piece of jewelry online or

in a catalog, perhaps you have noticed that most companies measure the

size of their jewelry in millimeters, not inches. For many U.S. buyers

who do not use the metric system on a daily basis, this causes

difficulty in being able to accurately guage the size of a piece of

jewelry in their mind, and can result in disappointment if the piece is

much larger or smaller than they imagined.



However, the following chart will help you to accurately determine how

large a piece of jewelry or a gemstone truly is, so you will better

understand the dimensions of the piece you are looking to purchase:







1 mm = approximately

1/32"

21 mm = approximately 13/16"





2 mm = approximately 1/8"

22 mm =

approximately 7/8"





3 mm = approximately 1/8"

23 mm =

approximately 15/16"





4 mm =

approximately 3/16"

24 mm =

approximately 15/16"





5 mm =

approximately 3/16"

25 mm =

approximately 1"







6 mm =

approximately 1/4"

26 mm =

approximately 1"







7 mm =

approximately 1/4"

27 mm =

approximately 1 1/16"





8 mm =

approximately 5/16"

28 mm =

approximately 1 1/4"





9 mm =

approximately 3/8"

29 mm =

approximately 1 1/8"







10 mm =

approximately 3/8"

30 mm =

approximately 1 3/16"





11 mm =

approximately 7/16"

31 mm =

approximately 1 1/4"





12 mm =

approximately 1/2"

32 mm = approximately 1 1/4"





13 mm =

approximately 1/2"

33 mm =

approximately 1 5/16"





14 mm =

approximately 9/16" 34 mm

= approximately 1 3/8"





15 mm =

approximately 5/8"

35 mm = approximately 1

3/8"







16 mm =

approximately 5/8"

36 mm =

approximately 1 7/16"





17 mm =

approximately 11/16" 37 mm =

approximately 1 1/2"





18 mm =

approximately 3/4"

38 mm =

approximately 1 1/2"





19 mm =

approximately 3/4"

39 mm =

approximately 1 9/16"





20 mm =

approximately 13/16" 40 mm =

approximately 1 9/16"





For comparison purposes, here are the diameter measurements of some common items:



Dime = 17mm



Penny = 19mm



Nickel = 21mm



Quarter = 24mm



It is also important to make sure that you understand the definition of

what the specific measurement is for. Here are some commonly

misunderstood definitions:



Diameter: The distance of a straight line segment passing through the center of a figure,

especially of a circle or sphere, and terminating at the edges



Circumference: The size of an item as given by the distance around it.





We do hope this information helps you to make a more informed purchase;

we always welcome any questions or suggestions regarding this guide or

any of our items. Happy eBaying!

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