This very well made gray Cobden Chert Woodland Cache blade was found in Union Co, Illinois and measures 4.1/8 inches long and is 3.5/8 inches wide across the body of the piece. This piece is made from a nice piece of gray Cobden Chert from Southern Illinois. This piece is guaranteed to be 100% authentic and unaltered. If you have any questions please feel free to email. Thank You