Hi AHB,
I'll be happy to give this a try, but can you please clarify what you mean when you say one side of your lips is bigger than the other? Your lips look fine to me, but perhaps you're referring to the fact that your upper lip---the part directly over your front teeth---seems a little thicker on the left vs. the right? If it's not that, please try to be very specific because I don't really see anything unusual about your lips and I don't want to "fix" the wrong thing.
Thanks
Rich
Forgot to mention... if I am right about your upper lip, then which way do you prefer? Do you want both sides thick or both sides thin?