It can be extremely confusing trying to visualize the differences in materials, such as Adhesive Vinyl, Magnet Sheet and paper when choosing the quality we need.

it might, at first seem irrelevant. but still leads to confusion when we asses the type of oracal vinyl, or even paper when they provide measurements in mils.

Mil Thickness Of Plastic Sheeting in millimeters and inches

How does mil thickness compare to mm (millimeter) and inches? What does mil stand for in measurement?
Plastic sheeting is measured in mils, A mil is a measurement that equals one-thousandth of an inch, or 0.001 inch. One mil also equals 0.0254 mm (millimeter). Thus a mil is not the same thickness as a millimeter. The term "mil" is not an abbreviation but a unit of measure. The chart below gives you an idea of mils to millimeters to inches. An every day trash bag ranges between 1.2 mils and 1.7 mils. A much stronger trash bag that offers better tear resistance is between 3 mils and 6 mils. A credit card is around 30 mils thick while a common deck of playing cards including the box is approximately .75 inches thick or 750 mils.

A digital micrometer can assess the thickness of various types of plastic sheeting. What gets interesting is if the plastic sheeting has string reinforcement known as scrim/ skrim or string. If the plastic is measured over the scrim, them it will be thicker than if it is measured where there isn't any scrim. The scrim gives the plastic much more strength when it comes to tear and puncture resistance.

9 Mil to Inches = 0.009
10 Mil to Inches = 0.01 (0.254mm) or (1/64in)
20 Mil to Inches = 0.02
30 Mil to Inches = 0.03 (0.762mm) or (1/32in) – Credit Card

100 Mil to inches = 0.1 (2.54mm) or (3/32in)
500 Mil to Inches = 0.5
600 Mil to Inches = 0.6
800 Mil to Inches = 0.8
900 Mil to Inches = 0.9