I m 21 years old and my height is 5'4". i want to more tall. is it possible? if yes, how?

Growth: Unfortunately once the growth plates are fused there is nothing that can be done to increase a persons final height. Kids with idiopathic short stature and open growth plates (as determined by X-ray) can be given growth hormone in efforts to achieve a little more height.

Shoe lifts: The potential additional length anyone can expect depends on areas in the long bones (arms, legs, fingers)called growth plates. This is where growth occurs and an active open growth plate means more growth is possible. An xray of the hands & wrists can be evaluated for bone maturity since there are many growth centers to see. If your bone maturity is > 18yo you are done growing taller.