Choose a navy and white blazer and dress pants if you're aiming for a neat, classic ensemble. Black leather derby shoes are a good idea to finish this look. This getup suggests how to dress well and look good as you work your way through your 20s.
Navy and White Blazer with Dress Pants Dressy Outfits For Men In Their 20s
Marrying a navy and white blazer and dress pants will allow you to assert your outfit coordination expertise. Black suede loafers look awesome finishing this ensemble. If you want people to see maturity in you as a gentleman in his twenties, an ensemble like this is what you're looking for.