I used the pattern from www.thehappyzombie.com to create this 'flat bottomed' bag. I've used her pattern several times to create bags but not tried one with corners like this. I got very confused by the instructions until I got my husband to help with it! Despite that, I'm actually quite pleased with how it worked and will be trying it again with a bigger bag. I made this one very small just so I could practise, but I might make some as gift bags for Christmas now!