This is a plastic, white m&m that I made using the makerbot. It is one inch by one inch.

I made a file on Adobe Inventor and extruded the circle and the m. I looked up what font is used on m&ms and used it. I converted my document into an STL file to be used for the makerbot. Next, I put it on a flashdrive and plugged it into the makerbot. After it finished preheating I pressed build and it created my object.