My favorite of the ones I've hand pieced is the green Around the World that I did using 2-1/2" squares. It was very easy to keep track of. I put my cut squares in sandwich bags and hung them on a metal ring. The assembly works just like the GFG. You add blocks around the four sides of the center square, then proceed in stairsteps for each round. Once it is as wide as you want it, you just add at the ends and finally at the corners only till you add the final single square at each corner. I'm still thinking on whether I want to add a border to mine.