If you've ever asked yourself that question, or any other question about fabrics, check out the new Fabric Resource at the Vintage Fashion Guild! My friend Maggie of Denisebrain has been working on this project for 5, count 'em, 5 years. Maggie has put together high quality scans along with definitions and descriptions of almost any kind of fabric you need help with. It's been a true labor of love and is a huge service to the vintage community. 2 thumbs up to Maggie and the VFG for this fabulous resource!