I started with a nine patch made from 2" squares.
I didn't iron the block, which I might do at this stage another time.
Then four cuts, cutting diagonally across each mini square that was made.
I do realise that the photos would have been better if the block had been ironed!
My nine 2" squares gave me two blocks that are 2 7/8" square.
I'm told that if you start off with nine 5" squares then you get two blocks that are 8 1/2" square, which seems to be a good useful size for making a quilt.