i'm 5ft 4.5ins and weigh about 8 stone 9lbs. Can't be too heavy cos I still fit in size 8/10 clothes. If u think you are too light or heavy work out your BMI. Search BMI on google. Good way of working out height to weight ratio.
I'm 5'6 and believe I am between 10 and 11 stone. I don't care though...I have boobs and an arse now and am much happier than when I was 6 and a half stone.