Client contracts for and pays an advance on a poster/postcard package. I finish the
poster. Then the client decides that the small 4 x 6 postcard is instead going to
become a large 5 x 8 invitation with heavy text on all three panels.
I tell him that's going to be more money. He want to know why. Patiently I explain
that 5 x 8 is larger than 4 x 6 and 4 panels are more than 2 sides.
So then he cries, "But it's just text!"