Here is a great chart to have when purchasing fabric for projects. This comes from the McCall's pattern company. It helps you when you don't have the exact width yardage that the pattern specifies. You look up the amount required on the pattern and then can convert it to the yardage of the actual fabric you are purchasing. I tried to post the chart directly but the format got rearranged. This link should take you right to the chart and you can print it off for yourself. It is a nice reference for those of us who sew regularly or maybe even more helpful for those who don't sew regularly.