I am doing a version of the Jelly Star quilt. Each block is around 11 inches. I want to put a 2 inch (finished) sashing between the blocks but not sure just how to accomplish this to get it all to connect correctly and visually right.

There will be 3 or 4 blocks across and 5 down. I will be putting a border which will be approximately 4 inches wide and then the binding. Might add a second border but right now I'm just planning for 1.

Thanks,
Julia