Need help on size!!

[Geo199]

Hi to everyone..
I have a problem on finding the right size on my next board which is gonna be Cabrinha Custom.
I am 1.83cm and i weight around 78 kilos.I ride in pretty choppy waters usually 15 to 25 knots.
I am new to the sport (1 year) but i have a 7 years experience in wakeboarding so that helped me progress really fast.
Now i am confused which size should i choose, the 133x39 or the 138x41,5??
From my wakeboard experience "the bigger the better" but does it stand in kiteboarding also??
I see many wakestyle kiters ride big sizes (Andre Phillip, Jason Slezak, Moe Goold..)
I would appreciate your opinion...
Thanks

[stamp]

go for the bigger size if you are going to be riding with boots.

[alexprehn123]

138 all the way not that big at allll im 60 kgs