Bill did his math magic on the card size and what size to carve the image on the block (i.e., how much margin to leave so I can crop it to fit). Now all I have to decide is whether I want to carve an 8x10 or a 9x12 block. Tiny detail seems to call for a larger block.
Measuring now. Bill worked up the measurements for me,
Print 4.61 x 7.17
Bleed (full image) 4.72 x 7.28
On the 8 x 10, 10 inches high, 6.5 inches wide
On the 9 x 12, 12 inches high, 7 3/4 inches wide
but I really have to print out a cartoon and hold it up to the block to see what I think. Still dithering between blocks, but I'm leaning toward the larger one. That castle motif is awfully small.