If you sew, you probably know that most fabric stores carry zippers in lengths from, oh, 7" to about 22" long. And one of those would be fine for your average run of the mill strapless wedding gown. But I realized after mine was already under way that my full, high-backed bodice was going to require something different. And I panicked a little.
And then I found Sullivan's Make-A-Zipper (which I found for a great price at createforless) and I knew that it was all going to be okay! So, what this product is really meant for is cutting 12 of your own zippers whatever length you may need. Pull one of the zipper pulls into the zipper fabric your're using and cut off however much you need. Just make sure you stitch around the base and the ends so your zipper pull doesn't come off, and you're golden. But what I used this product for what creating an invisible zipper that was about 30" long, which is hard, if not impossible, to find. I was so relieved to realize that I had found the solution! And actually, I still have quite a bit of the 4 1/2 yard spool left to make zippers with my other 11 pulls too. It's a great deal, and such a life saver if you occasionally need odd-sized zippers!