The term used to rate the quality of waves as they break down the line. Perfect shape is if the waves peel off down the line without any sections. Average shape might be if the waves peel off but has various sections the surfer must navigate around. Poor shape is if the waves are closed out or if a surfer can't make it through the sections down the line. Also the outline and specifications of a surfboard, and/or the action of shaping a surfboard.