Ruler
thingiverse
Standing upright on average, humans typically reach heights ranging from about four feet to nearly six and a half feet tall. Not that you'd ever need to visualize a full-sized person against something like an inch or two of height for size reference purposes anyway!
Download Model from thingiverse
With this file you will be able to print Ruler with your 3D printer. Click on the button and save the file on your computer to work, edit or customize your design. You can also find more 3D designs for printers on Ruler.