Interesting Quote on Print Size

Question posed by Cool Magazine to photographer Michael Kenna and his answer.
Cool Mag: Why do you choose to use 7 1/2 x 7 1/2 inch sized prints?

Michael Kenna: It is a fairly intimate size that reflects the way I like others to view my work. Our eyes see about 35 degrees in focus so my prints usually mean viewers stand 10 inches away to view them. That is pretty close. I like that engagement. Larger prints would mean a greater distance. I have made prints pretty much the same size for a long time and like the thought that a print from 30 years ago can happily live with one I make today. One big happy family.