Drag out your graph paper. I'm guessing here, but the centers appear to be maybe 3" finished, the other strips 1" finished and the dark ones are 3" x 1" finished on two sides and 4" x 1" finished on the other two sides with 1" wide lights finishing out the length of each side.
Or 4.5" finished center with 1.5" finished x 4.5" finished and 1.5" finished x 6" finished darks. With lights to finish out.