if you want it to become a block block .. Which I hadnt even considered ...
Continue the log cabin to 12 1/2" (you may want to cut the centre square at 3 1/"2, but keep the strip sizes at 1")
Add hat material to the same size as the block (hopefully somewhere around the 13" mark)
Continue as directed and after cutting on the diagonal into two and pressing you will have two Santas ... both larger ... one of which could be used as a flat block within a quilt.
And you can see who spots it as a Santa!