I hope no one is buying a special pattern for this unless they want to! You can just select a favorite block and, depending on the size, do three or four. Add sashing and borders if you wish to get to the minimum size, or don't sash if that works with your design. I made up the pattern for both the runners I made for the summer swap, one had pieced blocks and one I did machine applique based on a simple design I drew. Easy. And fun.
Well, we have 68 signed up for the fall swap. This should be interesting! Double the first one! The link to the list of participants is on page 1 of this thread if you want to check that your name is there. I think I've got everyone. I'll be in touch the first weekend in July with the partner list. Have a great week!