I bought a bolt of white fabric to make a Cathedral Windows quilt and washed the entire amount, left it as one long piece then wrapped it back on the cardboard it came on - cut off the first amount I was going to use and ironed it and cut it into the 9 inch squares. At first I was going to wash it in 3 yard segments but then thought there will be a time when I either don't need 3 yards or will need more - so just cut it and iron as I need it.