here and here.
The original pattern calls for a 10" square of fabric and a 16" or longer zipper. I've found that I can manage with a 14" zipper if necessary and also, if you have longer zippers, you can make larger pouches. That whole math thing. I've been amassing a collection of zippers from various places. Joann store closing, Hobby Lobby clearance and the thrift store.
Speaking of batting, the pattern calls for fusible fleece. I just use batting and an adhesive spray.
Linking with Crazy Mom Quilts