The Sioux style original that I have seen with sinew backing (a whopping total of ONE), was about 1 1/4 wide, about 44 inches long, no recurve to the tips, no setback in the handle, and had taken about 4 inches of set even with the sinew. Admittedly it was in poor shape and had not been conserved by a proper museum. Near as I could tell there were multiple courses of sinew and they were pretty coarse. If it was a bow that I had sinewed, I would pull the sinew and hide glue off, add water, set it on the back of the stove and start a new batch of hide gluefrom it. It really looked crappy. I am sure it was functional, but it was obviously made with no attention to aesthetics.
Wish that bow could speak, I have a lot of questions unanswered.