First, you are a very pretty lady
In my experience posting pics at this site, sometimes trying to get the right lighting, angle and distance from the camera is tricky.
If you could take a few more pics - front, side, and back of hair - that are close up (like the first pic you just posted), but with more even lighting, that might be more helpful. From these pics my general guess is your hair is somewhere in the 3/4 or 4 range. Your pattern/s may change as your hair gets longer too.