I like 12 x 18 You can get a real nice frame for less than the price of a guitar that way. Definitely better than 8 x 10 kissable photos of Bobby Sherman, ripped out of Tigerbeat magazines! I doubt I would 'collect' them, but I would probably buy ones of basses I would like to look at in my home/office.
Hey, speaking of frames . . . Don't youse guyz work at a wood shop?

Hint, hint. Laminated frames might sell better than the little boxes you sold previously. I love that idea!