On the bow above the thickness of the lam center is 5/16".
Total length of lam is 13 1/2"
Handle is 9" long from,end,of fades.
Handle thickness at thickest point 1 3/4"
Lam could have been 12" and would,have been fine.
General rule for handles on a longbow is 4" for handle or width of hand then add 2 inches fro each fade.
So 8 inches is good. Would only add a inch or two if desired..
In my opinion longbows with extra lng handles look awkward.
With a 10" handle a 14" lam would be plenty.