Target Stencil
thingiverse
The best bet to prevent overspray with this is a border of masking tape. That'll save you a good bit of money on filament.It's a stencil of yours truly, by the way. I look awfully intimidating, don't I? Better paint me onto a piece of cardboard and then shoot first!
Download Model from thingiverse
With this file you will be able to print Target Stencil 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 Target Stencil.