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Old 31st January 2010, 05:29 AM   #18
Join Date: Nov 2006
Location: Niobrara
Posts: 110

sail size X5 + 3 = fin size
so 4.0 sail..... multiply times 5 = 20 + 3 = 23cm fin

there are several "in the ball park" formulas for fin selection, since windsurfing is not a math type science , thats all these math type formulas will do, I noticed Roger stated
80KG , I have seen that 75KG is the average weight when referring to fin size, board liter float on..on Being 57KG (eat more cheeseburgers) using my above posted formula I would look at 20-- 21cm .
good winds
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