Sizing spray and spray starch are not the same. If you want sizing, I would use "Magic Sizing". I don't use starch. But sizing is easy to use. I did a "Block of the Month" type thing with a quilt shop. The fabric was really thin and I had a hard time piecing with it. After I added the sizing, it was much firmer and easier to use; without having a paper like quality to it as you'll find with spray starch.