Board Sock Questions.

When I got my single board Dakine bag, the fella recommended I get a board sock, too for some extra protection.
1) How much 'extra protection' will a board sock serve when flying?
2) My board is 6'7", do I get a 6'6" because it stretches or do I get a 7'6" or somewhere in between?
Thanks again, as usual.
1) How much 'extra protection' will a board sock serve when flying?
2) My board is 6'7", do I get a 6'6" because it stretches or do I get a 7'6" or somewhere in between?
Thanks again, as usual.
