Im floored.

every one of you has it all wrong. let me shed some light...

4x5 - sub mini format
5x7 - mini format
8x10, 7x11, 10x12, 11x14 - small format
4x10, 5x12, 7x17, 8x20 - anorexic format
14x17, 12x20, 16x20 - medium format
20x24 - large format

its so simple.