Like Carl said, nothing can be guaranteed. However, Dr. C seems to have refined his technique over the past few years and the results show that. I think that because you are wanting to err on the more conservative enhancement with emphasis on natural aesthetics, you should go with 10%. That said, you can easily obtain a .5\" increase with 10%. But, the overall outcome is dependent on how your body reacts, post op care, and other factors. I do, however, think you could come out on the other side with a very natural appearance.