Well, luckily there are not a lot of pattern pieces to this dress. If I were you, I’d cut out your pieces and take them with you when you go to the fabric store. That way you can lay them out on the fabric at the cutting table and get exactly what you need without guesswork. You can probably get an employee there to help you as well. Just make sure you’re choosing a fabric that’s a two way stretch lace. If you purchase a lace that’s not stretchy, it’s not going to work because there are no fasteners. I’d love to see a picture when you finish! You can do it!