How to Create Mitered Corners, by Sara Moskovitz
Added Nov 14, 2011
New York, New Yo...
Beginning at any of the sides, use an iron to press the fabric within your seam allowance. I used my Petite Press™ Mini Iron by Dritz® (great for small, delicate ironing jobs) to create a sharp and crisp crease line.
Use a ruler, as well, to make sure you are keeping a consistent measurement all the way across your seam