Alright I've search some, but this site is getting hard to read all the posts. Good news for Apug hard to search.

I'm looking for information on the optimum pinhole size for said distance from film plane.

Mainly 13, 14, 15, 16, 17, 18, 19 inches. Or is there a best fstop size. then I could figure out the hole size. I'm picking up my homemade 9.5x20 pinhole camera tomorrow. Can't wait to give it a try this weekend.