I make a really nice tote with charm squares but have never had a pattern. Two colors in Batik works very nicely. Just join squares together ..alternating squares. You can make it all one length ...just use as many squares as it takes to get the width and length you want. I sew the exterior body to warm and natural batting and quilt either with feather stitch between squares or straight line quilt whatever you are comfortable with. I then make a lining the same size and quilt it to separate batting. I find double batting gives a nice body to tote. Add a pocket to the interior and a key fob and sew it all together and you are done....sorry don't forget the straps at the top and also a magnetic snap. Almost any tote pattern will help you put it together but it is really simple and pretty fast.