Everyone is different. I am the same height as AZfiddle and I weigh 107. I weighed about 105 in HS, at times 100. I was thin, but not skinny, and definitely not muscular. The most I've ever weighed was about 125 and it was not pretty. I gain everything in my azz and hips and I just got wider and wider until one day my dad told me I looked like a "pig." He was right, though mean. I weighed 130 or so when I was 9 months pg with DS #1 and I didn't look as big then, because I was exercising.
When I weighed 125 I went on a vegetarian diet and started walking and doing calisthenics. Once I got down to about 105, I kept eating right and exercising. Besides being pregnant, the only other time I gained weight was in my mid forties, when I had gotten burned out on aerobics and sort of let my pre menopausal self think it was OK to just let my body get fat. But, I hated myself and it was during this time DH started riding. One day I went out and walked 5 miles up a huge 3 part hill, when it was about 90 degrees out, and I had no water. I was furious with myself for letting myself gain 15-20 lbs or so, and I cried the whole way. When I got back, DH told me if I could do that walk, I could ride. About 2 months later, he bought me shorts and a jersey and set up an old mt bike for me. I was 47. It took me 2 years to get down to where I am now, but I've never gone back. If my weight gets to 109, that's my danger zone and I make radical changes. In the summer, I don't have to worry. I always get down to 105 without trying.
2015 Trek Silque SSL
Specialized Oura
2011 Guru Praemio
Specialized Oura
2017 Specialized Ariel Sport