According to size you have mentioned you do not have micropenis....don't go by porn sites standard measuring techniques are needed to say you have micropenis...regarding premature ejaculation Treatment may not be needed. Practicing relaxation techniques or using distraction methods may help you delay ejaculation. For some men, stopping or cutting down on the use of alcohol, tobacco, or illegal drugs may improve how well they can control ejaculation...if no improvements medical treatment needed..consult nearest urologist they will do the needful.