Millimeters are considered to be very small. This is why millimeters are perfect for measuring parts of jewelry. When trying to convert millimeters there are many different conversions that can be made. For example one millimeter is said to be 1/32 of an inch. An inch is said to be 25.4mm long. When looking at the conversion it's important to try to visualize exactly what the length you are looking for is, and that is what you can do here.