I've always found the BMI a useful guide.
I'm 5'9, currently 147, and I'm pretty muscular with broad shoulders -- though not very big-boned. My BMI, 21.7, is fairly in the middle of the normal range (18.5—24.9 is "Normal").
The CDC calculator I used said : "For your height, a normal weight range would be from 125 to 169 pounds."
That's a pretty big range.