Surfing Waves

I'm looking for a new shortboard, cause my first one is wave to big for me.
I'm 5'1" and 110 pounds. i was looking at a 5'10" Al Merrick Ksmall. and i was wondering if that is still to big. i surf 2- 6 foot waves.

what would be the ideal board size i should be looking for?
thanks

u are 5,1?? 5.10 is deffinitly to big, unless you are still growing and want a board that will still b brilliant wen u get to ur prime size ( i am not being offensive) i wood say if u were to buy a board u r looking at 5.6