When ordering fabric for a project, you want to measure the width of fabric divided by the width of 1 piece of your project. This will give you a total of how many pieces can fit into that total width of fabric. Then figure out how many pieces you are planning to make, and from there, determine how many yards of fabric you need. I always advise people to buy more fabric than they think, especially if things like 1 yard cut it close. It's always better to have extra when you invariably make a mistake.