I´m a rookie. What does the different measures on the board stand for. There are three different width measures. The first one is where the board has it´s widest point somewhere around the middle of the board but the other two?? The thickness measure of the board is at the widest point or? Would be gratuful for any help

Measure back from the nose 12", and get the width there. Measure up from the tail 12", then get the width there. Those are the other two measurements. Doug