what size board should i get ????

im about 5 ft and ive been surfing for a number of years and i am confident enough after hiring some shortboards, to buy one for my self but i dont kno what size board i should get
can You help me ?????
thanks
o and im on a 6,8 minimal or something board at the moment if that helps
can You help me ?????
thanks

o and im on a 6,8 minimal or something board at the moment if that helps