Surfing Waves

what would be the dimensions for a loose high performance board bigger than 6'1?

depends on the rider really, weight, height, surfing experience .... what you looking for?

just wondering would these dimensions 6'3X19 1/4"X2 1/2" be able to do some powerful turns, cutbacks and would it be able to get enough speed to pull off an air

i do not see no reason why not but it all depends on u

yea thats quite a decent size, width and thickness is good, all depends on your power and strength though, if you can turn it quickly, but that depends on you, its easy to build strength and power