It doesn't matter. As long as your "repeats" are correctly lined up AND your strips are straight, all you have to do is cut the triangles the EXACT same size, and the hexagons WILL be the same size when you go to sew them together. So yours will be a little smaller. No big deal.
Also, your ruler is one of the newer ones with the tip chopped off....they might be referring to the older rulers that have the point.
You have the better ruler, and your triangles will sew together much more easily and evenly.
So no need to fret, and start cutting and sewing. :wink: :wink:
I think that's a FABULOUS fabric for a OBW. Can't wait to see the finished product.