Here is a picture of the pattern that I made up with measurments. I used a 3/4" 60 degree hexagon that I had here for GMFG quilt that I am making and a quilt ruler.
I used the 3/4" hex because it was what I had you could use any size and make the pieces different sizes as long as the short ones are one third the size of the large ones.
Need help? I will try to help.