Start with a sheet of printer paper to develop the design. Fold the paper in half both vertically and horizontally. Draw just one fourth of the design. (See Photo.) Once the design is satisfactory, mimic the folds and design on the larger paper for the template.
Once the larger template is complete, tape it up and trace around it. You can paint the entire space or cut out a square/rectangle if you'd like. Then just paint it. That's it you're finished with the stencil. Place words or a framed picture inside and Wa-Lah!