I'm 20 yrs old and my height is 173cm wanna increase own's height more up to 6-8 cm more to enhance my personality plz suggest me something?

No growth last year?: If no growth in the last year, then growth has finished. Most people reach their maximum height in their late teens. Without nutritional problems or chronic childhood illnesses, height is largely based on genetics and parental heights. Aside from eating right, exercising, sleeping well and being happy, there's not much a normal person nor his doctor can do to increase height during the teen years.