Try this fantastic free Felted Windy City Tote Bag  It is a good basic pattern to knit as is, or allow your imitation to run wild in colors and design.  Lion Brands offers so many awesome free patterns for you.  They have a variety of pattern categories and methods in knits and crochets.  Type in what style of pattern you are looking for. Do not let a pattern you love that is not felted, stop you from up-gauging and trying a swath to determine the measurements you will need enlarge the bag so it can be felted.