Surfing Waves

I'M 6.3 about 180 pounds.
Heading to Biarritz and also bigger swells in pacific, And buying a 4 Finner!

Above is the board, What size should i get?? Please help! Expert advice is need. I'm only a decent surfer leaving the country to become allot better, But my heart is set on this board! I love 4 finners

5,10? 6.0? 6.2? 6.4? 6.6? 7.2?

Weell, I'm 200lbs but have been surfing 15yrs. So if you are really good the 6'2, intermediate 6'4 and if you are just a begginer get the 6'6. The 7'2 would be the easiest of all to ride, so if you haven't been surfing long get the largest one they make, but the others would perform better and duckdive easier.

If i got a 6.2 would i be able to work up to it???

In time, but it would frustrate the heck at you in the beggining