I had to keep going back and forth between your pictures looking at your face to see that it is really you in the "after" shot.
You look great, as others have said here. Congrats on doing the work and succeeding!
Like others mentioned, I weigh the same now as I did when I was 18 (am 45). Back then I wore a size 3. Now I wear 00 or 0.
Congrats,
Atheria