This is the pattern I am going for in my latest afghan project. I am either going to simply join all the squares together, or choose a color with which to border each square and then do the edging of the whole blanket in that same color.
The benefit of adding a border to each square is that I can make them more “square” and closer to the same size. I find that my gauge changes depending on my mood. For this reason, each square is between 6 and 6 and a half inches long and wide. When I add a border, they should be about 8 inches each.