Have fun arranging your pictures, try different heights, positions, angles, groupings etc. The paintings in this photo are of 4 lily's I did in oil. There is a variety of ways to hang these paintings: horizontal, vertical, a square, staggered, 2 on left side of a window or door and 2 on right side. You get the idea, arranging this grouping is endless. I had these paintings in a gallery and they arranged them a couple different ways and both ways looked great.
Check out this link for more ideas:
http://www.completely-coastal.com/2009/07/arranging-pictures-are-you-following.html