Open Question: I'm 5'3 and 131 lbs am I fat?

Well technically I'm 5'2 3/4 but I just round up to 5'3 since I'm so close and to simplify things lol...... I weigh 131.6 lbs am I too fat? As for jean sizes since they vary so much from company to company I can be anywhere from a size 4-size8 but I'm a size 6 in most companies, just a 4 if I'm lucky and 8 if I'm unlucky. What do you think?