The greatest thing about making your own tote bag is the control you have over the size, color, pattern, etc. I decided to design my own fabric. I used graphics from The Graphics Fairy and produced fabric through Spoonflower.com... which is a crafters/designers dream.
Not only is the bag reversible by turning it inside out, but I gave the bag two slightly different front panels for some variety. For a How-To Instructable, click here.