I've just started out in this hobby and already have my first success (Ian McKellen)

I would be interested to know what size photos people send out. From looking around 8 x 10" seems to be the standard but
the best images I get from google searches tend to be HD wallpapers which print out better in 8 x 12". Also the "Please do not Bend"
envelopes will hold both an 8x10 and a 8x12 (more suited to an 8x12"). In case you haven't guessed

its for my own display. Just curious thanks.
Another quick question, what would be the best method to get bends out of a photograph. I went with the 6 x 8" first knowing it would fit through
the letter box np and be less prone to bending. Moving up a size I'm worried about the possible damage. Can dry mounting for example get out dents etc.
Regards,