I'm not aware of any size regulation; but it should be big enough to see and small enough to ship.Originally Posted by rogueish
I do B&W only myself, as do many other participants. Lately my B&W prints have shown a strong tendency to come out blue or brown, but at least they are monochrome - mostly.
I don't mount. I have no mounting press, nor do I intend to buy one. My last entru as mounted, but with archival tape in a window mount. That may happen again, but there's no guarantee.
Besides, unmounted prints are less (not more) likely to be damaged in the mail. The mounting boards are stiffer, but break when bent unlike the photo paper which flexes.