Karve the open water. Size Chart Size (CM) Area (Sq Inches) Height (Inches) Center (Inches) Rocker (Angle/Arc) Weight (LBS Range) 40 594 1.8 16.2 8.2/Bended Up to 180 42 623 1.9 16.2 8.2/Bended 155+ 44 653 2.0 16.2 8.2/Bended 165+