nwm50..I think 12-15" would be long enough to make sewingsuz's bags. This is the tutorial I have used for my selvage chickens. One only needs the length of the square so makes use of the short pieces. My chicks started with 3.5" and 4.5" squares. Both sizes work well.
Selvage or Funky Chicken Pincushion
I'm hoping to make this pattern someday, using a depression green for the solid fabric.
http://welovequilting.com/free-patte...lters-society/