2 things will determine your ultimate thigh size. One is whether you're a masher or a spinner. Spinners will look more lean like a runner. Mashing with lots of power at low cadence is closer to weight lifting. The other, and this is the biggie, is your genetics. As a female you'll never be huge. But some people tend toward big bulky muscles and some tend toward long and stringy. Can't do anything about that but love your new strong and hard legs.