How thick is 1mm?
Samuel Coleman
Updated on May 03, 2026
1mm = just over 1/32 inch. 2mm = just over 1/16 inch. 3mm = almost 1/8 inch. 4mm = 5/32 inch (= a bit over 1/8 inch)
What items are 1 mm thick?
A millimeter is about the thickness of a plastic id card (or credit card).
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Lots of Examples
- about as long as a staple.
- the width of a highlighter.
- the diameter of a belly button.
- the width of 5 CD's stacked on top of each other.
- the thickness of a notepad.
- the radius (half the diameter) of a US penny.
How big is 1mm thick?
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).
How big is a millimeter?
A measure of length in the metric system. A millimeter is one thousandth of a meter. There are 25 millimeters in an inch.What is 1 mm on a ruler?
Like the inches ruler, you'll see tons of lines on a metric ruler, with some longer and some shorter. Each line represents 1 millimeter, which is equal to 1/10 or 0.1 cm (so 10 mm make up 1 cm). There will always be 10 lines from one centimeter to the next centimeter.How to measure in mm
What does mm look like?
Look at the unmarked lines on a metric ruler.The numbered lines correspond to centimeters, while the unmarked lines indicate millimeters. If you look closely, you'll notice that there are 10 millimeters in a centimeter.