The long Indiana Hornstone blade measures 3&5/8" by 1&5/16", barely exceeds 5/16" max thickness. The blade edges are four-sided sharpening, quadra-facial, a specialty of the Early Archaic Kirk Culture--Gibson County, Indiana, in this case. The one lower blade edge shows a deliberate salvage attempt, re-hafting the big (still usable) knife--the opposite blade edge shows more modest indentions for re-hafting the knife. Note the center of the nodule quartz inclusion forms the very tip, so this blade began as part of a very, very large Harrison County nodule--just shattering that huge nodule and getting a flat preform, not curved, was impressive work--the force it would have required to break open a nodule of hornstone of that size, you have to wonder how large of a hammerstone they used. Even as a snap base knife, this remains one nice Early Archiac knife, guaranteed authentic in every detail. The finders' info goes with the piece, provenance matters. Shipping is $6.00, checks or M.O>s are welcomed. Sorry, I do not use paypal--Roy A.