Looking elegant and mature comes with age and wisdom. You grow as you see and experience; it is more emotional that physical. Well, talk and behave like a lady; in the sense listen more than you talk. Wear solid and subtle colors and your make-up should look professional/ natural. Stay away from glossy/ glittery stuff. Be poise and confident whatever the situation may be. Do not wear shirts too low or skirts too short; it looks so much like a teenager. Practice walking and sitting with great posture and dignity. Just learn some etiquette, that’s it!