I wanted to test the big light wind board and took 7.0. That seemed way to big for these conditions but managed to get a little bit more of 58 out of it but if I can keep the board on the water (and with a smaller fin) 60+ is possible for sure!

At the end of the session I took the 6.3 that I used during the day with a smaller board to see what it does. Its not the ideal size for the board. 7.0 and 7.8 will be best but I had to try it so now I know.