I grabbed this lovely bee design off thingiverse. It is designed for 3mm material, but you can use other materials by simple scaling.
The PDF is the most convenient file format for me as I don’t have Adobe Illustrator.
Turns out, you can scale PDF on OS X by opening it in Preview, then printing it. In the print dialog, type in the % you want to manually scale by. If the design doesn’t fit a standard piece of paper, select some really huge paper.
Then, simply Save to PDF and you’ve got you’re scaled PDF!