This photograph was taken of Hayward Lake mountain range, the sun was just finishing setting but the moon stole the show. 
 
I made these prints large scale
20" x 30" to be exact. 

This print will work great in a 20"x30" picture frame with no matte,  or 24" x 36" if you want a matte. 
Alternatively for a more minimal look try a wood magnet style frame where there are two wood bars on the top and bottom, and the print is held in place with magnets.