How can I grow bigger? In height and size?

I'm tired of feeling like a adult stuck in a little teenage body. I'm older than 20, 5'8 at most, and 155lbs. I'm just tired of feeling like such a child compared to my co workers classmates and frankly literally anyone else male and female, it feels like everyone is able to grow just fine but i been stuck like this since i was 17 I want to grow up too
How can I grow bigger? In height and size?
Post Opinion