These are 72" long. The one was sort of roughed out (I think) with an English warbow in mind, so bending through the handle, and probably with a D profile. It tapers to 1/2" at the tips.
The second is not tapereed and remains approx 1 1/4" wide all the way to the tips.
I would say about 50 - 60% of the sapwood has been removed entirely, and in patches along the back of the stave.
If a selfbow can be made out of yew without the sapwood being in place I may take a stab at that...