If you're not already convinced of the merits of size, check out this conversation from Facebook below:
...big has so much more impact. I sell everything that’s on display on my walls - so I really want to get a big framed print up….
So there you are. Long story short: go big!
(Especially if you're fortunate enough to have an image taken by the seriously talented Awhina - if you haven't already - go. see. her. work. Amazing!!)