FIN Size for Carve 122

[pietro]

Hi!
first of all, sorry for my bad english
in any case

I got the carve 122, i am 82 kg and i am lokkoing for 2 fin
My sail are:
7.5 severne C2, use at the lake, sometimes in marginal condition sometimes not
lof twave 5.7, use at the lake and at the sea

wich size and type of fins you suggest?
what about the series fin DRAKE 38 cm?
Do you think could be right for one of the two sail?

I am looking for you response!
good wind

Pietro