If customer say “I want 20x24” print” what is a choice?
Large things make, in general, “bigger” impact on our perception (e.g. Old Egyptian architecture). So this comes to esthetic side.
Larger print means larger mat which means larger frame with larger glass, and so profit is much larger. So this is profit side, for somehow we have and stomach and banks around the neck.
If I hang 8x10 family portrait on the wall and a large sofa is in front, many will wish to remove the sofa and come close to see the photograph. If even 11x14 is above a large fireplace it is just lost. The photograph size has to be in harmony with surroundings and viewing distance….
In some galleries and museums there is viewing distance restriction, and small details on small print will not be noticed, ….
If a print will be viewing from hand, viewer adjusts distance by instinct, and in this case when 11x14 and smaller are in play I would give vote to 5x7 or 8x10 with average size of details.
Also professional photographer must have and professional equipment. I have all sizes of washers and trays, all formats of cameras, and use accordingly. Many things in my darkroom I make myself, like different washers for different print size. Ac Bob C. said drying and keep flat larger prints is problematic, and whole process is time consuming, but also and highly rewarding. If you shoot just for pleasure or to show that you can make a photograph I just do not see any reason to go above 11x14. Even if you intend to sell your work as work of art, who will pay you for large print? If you guess your large prints can find customers you better start making it.
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