Here’s how to measure your seat to determine how much fabric to buy:
If you don’t have a flexible tape measure, you can use a string instead – measure your final string length on a yardstick or carpenter’s tape.
Repeating pattern allowance:
If you choose a fabric with a repeating pattern, you will need to purchase additional yardage so that you can place the pattern on your piece for a balanced ‘look’. Be sure there is a full pattern repeat that can be centered on the top surface with enough to wrap around and staple to the seat base. Here is a basic guide for 54″ or 44″ fabric bolt width: