Units of measurement can be a point of confusion when ordering 3D prints. This is the case because 3D printable files can be created using mm, cm, or inches as the unit of measurement. If the unit used to create the file does not match the unit used to order the file, your print can have the wrong scale.
Let’s say you designed a box that is 3x2x1 inches, but when you upload it to be printed you select millimetres instead of inches, your box would now be 3x2x1 millimetres! A lot smaller than expected. 0.1x0.8x0.4 inches, to be exact.
It is really important that you select the right unit of measurement used to create your file when submitting it for print. This option is available on top of the uploader and the selected unit is highlighted in blue.
To make it easier to determine whether you are using the right unit of measurement, we change the units on the Size and Volume lines to match the unit selected. This way you know the expected size of your print.
In the example above, about the box created to be 3x2x1 inches, if the right unit (mm) is selected, we will display the following:
Size: 49.87 x 58.45 x 39.37 mm
If the wrong unit (cm, for instance) were selected, we would display the following:
Size: 49.87 x 58.45 x 39.37 cm
If you designed the model yourself, you can obtain the unit of measurement from the program you used to create the file. If you had the model designed for you by a third party, they should be able to tell you what was the unit of measurement used when creating the file.
Sometimes you will have multiple files with different units of measurement. If this is the case, please submit them separately (in multiple orders) and let our Customer Support team know. We can make sure all your parts ship together.