I'm going to assume that the block is finished at 6 inches. One way to do this is to make a 1 inch grid across the 6.5 inch block (I would do this on a copy). Then take a piece of paper that is at least 12 in by 12 in. Make the same grid but each block on the new grid should be 2 inch by 2 inch. Then copy the design over. Does this help? I couldn't find an image of google of the block.