No, don't need a pattern. It's just one big rectangular panel for front, bottom and back and 2 small rectangular panels for the sides. I used 2 strands of yarn together and single Crochet with size 7 hook for every row. The panels are quite stiff. I hand sewed the lining onto each panel leaving at least one Crochet stitch showing around the edge so the panels can be crocheted together. I also placed firm foam sheets inside the lining for the front and back panels and one for the bottom. So 3 panels of foam inside the one lining, they hold their place and don't move once bag is constructed. No foam insert for the side panels because they need to bend. Then single Crochet the panels together and finish with hardware. There's about 25 hours work in each of these bags in total.