Conversion chart mm and inches

Quite often jewelry and gemstones are measured in millimeters (mm) instead of inches since they give a more precise measurement of the size of the item. However, this may be confusing to some people as they may not be familiar with the metric system and how large a millimeter is. As a starting point it may be helpful to know that there are 25.4 millimeters in one inch. One millimeter is 1/32 of an inch. You can convert millimeters to inches by multiplying the millimeters by .03937 which will give you the equivalent in inches.As a point of reference, a dime is 17mm or 11/16 inches, a penny is 19mm or 3/4 inches, a nickel is 21mm or 7/8 inches and a quarter is 24mm or about 1 inch. Unfortunately, okay only allows small photos in the guides so the coins don't show up as clearly as in the original photo.Here is a conversion chart for those who would like to use it:1mm = 1/32 inch--------------------------2mm = 1/16 inch--------------------------3mm = 3/32 inch--------------------------4mm = 1/8 inch--------------------------5mm = 3/16 inch--------------------------6mm = just under 1/4 inch--------------------------7mm = just over 1/4 inch--------------------------8mm = 5/16 inch--------------------------9mm = just under 3/8 inch--------------------------10 mm = just over 3/8 inch--------------------------11mm = 7/16 inch--------------------------.12 mm = just under 1/2 inch--------------------------13mm = just over 1/2 inch--------------------------14mm = 9/16 inch--------------------------15mm = just under 5/8 inch--------------------------16mm = 5/8 inch--------------------------17mm = just under 11/16 inch--------------------------18mm = just under 3/4 inch---------------------------19mm = just over 3/4 inch---------------------------20mm = just under 13/16 inch---------------------------21mm = just over 13/16 inch---------------------------22mm = just under 7/8 inch---------------------------23mm = just over 7/8 inch---------------------------24mm = 15/16 inch---------------------------25.4mm = 1 inch