I'm considering using a D9P block in a swap that needs to be the typical 12-1/2" unfinished square.
Having never done a D9P before, my question is...
Do I increase the size of the center squares to 5" to allow for the extra seam that will be created in the regular 4-1/2" square of the 9 patch?
Or do I increase the size of the block to be cut to 13" and make all the squares 4-7/8" ?
Or is there a better way to do this and come out with the right size sqaure?