Tote Bag Patterns with Flat Bottoms. Over 30 free structured, box-style, flat bottom tote bag patterns, tutorials, and diy sewing projects. Styles include easy and simple tote bag patterns for beginners, quilted and lined styles, zippered, grocery, and market tote bags. Instructions for how to make a tote bag with a flat bottom. #Tote #Bag #Pattern #Diy #Tutorial #Box #Structured #Sewing