There's no single "best" height that universally makes someone look good. Beauty is subjective, and what's considered attractive varies greatly across cultures and personal preferences. It's important to embrace your unique features and feel confident in your own body, regardless of height.
However, some studies suggest that certain height ranges are statistically considered more attractive. For example, research has shown that men around 5'11" to 6'2" are often perceived as being more attractive, while women around 5'4" to 5'7" are considered to be in the ideal range.
Ultimately, feeling good about yourself comes from within. Confidence and self-acceptance are far more attractive than any particular height.