The amount of space needed for a person to feel comfortable depends on the person and the situation in the professional world, standing too close to someone generally means that you feel you have more power than the other person. It usually makes people uncomfortable and should be used only when you need to assert yourself. On the other hand, a person who continually backs away may seem afraid or untrustworthy. Judge the space with which another person feels comfortable rather than your own distance. Clothing, hairstyle, and accessories are important elements of how you appear to others.
Dark colors are still preferred in professional clothing especially for men.
Once you are employed, observe how the women in the organization dress. If the powerful women always wear suits, take your cue from them and avoid wearing dresses or slacks. Jewelry should be simple, preferably gold, and never loud. Women should wear their hair short to mid length and neat. Fingernails should look manicured for both men and women.