I am trying to finish up a one block wonder quilt, in shades of blue with a hint of white. I was not thinking of the outcome when I laid out my blocks. Now as I am bordering it, I am feeling that it will be too long. I have a 2.5" dk blue border, a 1.5" white Michael Miller sparkle, and I was planning on a 5 or 6" dk blue border. right now it is about 86 x 55. I need an opinion if all the outer borders need to be the same width, or could they be wider on the sides and maybe just 3" top and bottom? Help!!!