Yesterday I tried this technique on a much larger sheet of paper: 18"x24". The advantage in that is when viewing you are able to enter the piece completely. You eye isn't constantly hitting an edge & there is enough detail to keep you engaged.
Arches Hot Press 140lb. 18"x24", Winsor & Newton Payne's Grey, Morton's Kosher Salt, American Painter Round 1 & Sumi Gold