These are called "Clear Project Bags," and they were custom made by Rebecca for me! She uses heavy duty vinyl, fabric, and zippers, and makes great bags for storing my cross stitch WIPS and the fabrics for quilts-in-waiting. These are the large ones, about 11 inches wide and 11 3/4 inches high. She makes smaller ones, too - there's currently one for sale at her etsy shop. You can contact her and ask her to make them up for you - not only are they reasonably priced, she's QUICK.