Hi Amanda! This is a fairly decent pattern. I do suggest that you make a mock up in the size listed for your measurements, and in the next 2 sizes down. If I make another, I will be going 2 sizes below what is listed for my measurements, that's for sure. As for zip boning, it is the industrial zip ties that you can pick up at your local hardware store. I usually buy the zip ties that are 32" long, as I can get more bones out of the package. This length of zip ties come about 15 ties per bag and will run you about $8. They are more sturdy, and will give you a better hold compared to the regular poly boning you can buy at the fabric stores. Just make sure you have really good pair of snips for cutting them.