The bow on page 90 in my TBB is a cane bundle bow
As for dimensions, each piece and species of of wood is different. If you're wanting an Eastern Woodlands bow, good general dimensions would be about 66-68" long, 1 1/4"-1 3/8" wide midlimb to midlimb, tapering down to about 5/8" nocks. Rough the thickness out about 1" in the center, 3/4" at midlimb, 5/8" at the nocks, and work it from there. Tiller it so that it just barely bends through the handle, if the handle is too bendy, it'll jar your teeth out with handshock and likely take a lot of set. Are you using the ash stave?