Questions
Is anything actually showing?
No. The back panel is a flat print on fully closed fabric. There are no cut-outs and no mesh, you are covered exactly as much as in any other pair of trunks.
How close do you have to be before you can tell?
A few feet. It reads convincingly at pool distance and obviously as a print up close, which is the whole joke.
What size should I get?
True to size in standard US men's sizing, cut relaxed. If you prefer trunks closer to the leg, take one size down.
Will the print survive a summer?
It is fade-resistant against chlorine, salt water and sunlight. Wash cold and hang dry, the tumble dryer is what kills prints.