D20 Button

thingiverse

The first of my line of nerdy buttons! Each one includes measurements from 20mm to 35mm. I highly recommend printing around .08 to preserve details, especially when it comes to the smaller diameter buttons. Printing with about 30% infill or three walls will keep it structurally sound if you plan on using it for actual clothing. If it won't see much use, you can definitely get by with less infill and fewer walls.