The Keyo Nat rode at Malibu in the summer of 1968 was 7'11'' and either 21" or 22" wide. Greenough drew up the template and sent it to Nat, and George later said Nat made it an inch narrower than the template. I think it was drawn out at 23" and built at 22", but it could have been 22" and 21" respectively.
Greg Liddle, about 6 years later. A refined, toned-down interpretation of Nat's Keyo. 7'1' x 22.5". The wide point wasn't as far up as on Nat's board, and Greg's outline had a friendlier curve in the tail. Greg rode this template for nearly 20 years.