Look to the insects on YOUR LOCAL WATERS...For the REAL Proportional info...
Most are different from species to species especially in the different stages of life a spinners wings should always be longer and such as that...I tossed those charts away long ago..
I would not use any Sulpher dry buy anyone else but me on my local waters for this very reason..the colors and proportions just would not be as to what I've seen on my waters...The Orange tinge that most use just is not there depending on where I'm fishing, I may use a pink hued fly or a very pale but bright yellow fly on a stream just a few miles away...to match whats really there..If I find that another requires yet another adjustment I'll tye flies for that stream as well...I keep seporate boxes for most waters I fish..maybe I am anal...maybe I just have to much time!!....LOL
Wish ya great fishing,Bill