I currently do not print any larger than 11x14. Why? It's a combination of the fact that big prints have never really done much for me (any more so than a smaller print of the same image), and the fact that I feel like an image loses something if enlarged more than the format can really support. Unless I'm enlarging from 35mm, I don't want to see grain in my prints. I want them to be sharp, very sharp. And I want good tonality. And the way these things come together means that I don't print 35mm or 645 negs any bigger than 8x10 usually, and 6x7cm and 4x5" negatives any bigger than 11x14. I can see myself enlarging my 8x10 negs to 16x20, but that won't be for a while as I don't see myself being able to afford an 8x10 enlarger any time soon.