How to increase height of a 21 year girl?

Make a taller image. Since a 21 year-old woman cannot increase her body's height anymore (her growth plates have fused), she must work on presenting a taller image. Expressing confidence and good leadership skills, standing with a straight posture, walking gracefully, wearing heels, wearing clothing with vertical stripes, and using other wardrobe techniques can all make a woman seem taller.
Can't be done. A girl of 21 years has finished growing, and there are no drugs that will increase her height.