Need some rag quilt help
I found some Ninja Turtle flannel today so I am going to make a rag quilt for my grand daughter. I have decided to make a 4 patch one where the main turtle fabric will be cut at 10" squares. Here is where I need the help. What size strips do I need to cut for the 4 patch blocks so that after I cut and sew them together with my 1/2" seam the block will finish out to be 10" like the main turtle fabric. My strip sets for the 4 patches are going to be the colors of the masks of the 4 turtles. Thanks for the help!!