Quilt codex include cutting instructions for a 9 inch block
Written instructions from Chock-A-Block for a block that is 8 inches finished.
this one is from adventures of a DIY mom and is a 9 inch block
and another from Eleanor Burns and Quilt In A Day which makes the blocks using a two at a time method
This block is based on a 3x3 grid, for more 3x3 blocks click here