I cut up a small paper bag that I've used over and over again because it is the perfect size to hold lunch or other small things. Then I laid it directly onto canvas and traced the size, adding a half-inch seam allowance on all sides. To the top and bottom I added a 1.5" seam allowance.
After some fiddling, measuring and back of the envelope math, I figured out that I could cut up a fat quarter into two pieces measuring 10.75" x 11" to make the exterior. The result is a perfect-sized tote bag to hold lunch or other essentials. And the canvas is nice because it lends some the bag some rigidity.
|The seal gives a sense of scale.|