All the sudden i'm quite self-consious of my labia. They are large (no doubt about it). Larger than people i've seen in mens mags or porn. Is the surgery easy? worth it? Or am i being really silly to even consider?

First and foremost men's mags and porns are airbrushed or editted to give the so called perfect ideal woman.
Every woman is different hence the labias will be different. Also what appears to be large to you may not actually be that large. We have a tendency to enlarge things we find wrong with us and belittle the things that are right with ourselves.

Everyone is different just as some people are tall and some are short. Some heavy and some thin. Their are no two women alike and no two labia's alike. I am sure yours are fine and don't even consider comparing yourself to the women in a mens magazine as those women are "phoney" if you ask me and not worth comparing yourself to them.