Originally Posted by
Tartan
I would put 2 of your finished hexagon flowers side by side and then measure the little diamond empty space to get the measurement. Since your hexagons are individual to you, you will need to determine your own size diamonds.
No disrespect to Tartan-her idea sparked mine, but I might have an easier way? - put two papers side by side, and two papers side by side above of first two, then outline the resulting diamond space and add seam allowances?