I am making 6" finished bow tie blocks right now with Christmas fabrics. Measurements are-
Cut 2- 3 1/2" squares of light or background fabrics
Cut 2- 3 1/2" squares of bow tie fabrics
Cut 2- 2" squares of bow tie fabrics
Hope this helps and if it doesn't work for you maybe I could send you a copy of the graph I had drawn out. Good Luck