Standing upright will make people look thinner.
Horizontal will have more visual balance.
As for color, it depends on what kind of boy he is.
If more fashionable people like to dance a little, choose brown, it won't be so boring.
If it is a little popular, black will not stand out.
Brown and black are wild,
But now spring is still the season that needs color.
Personally, I think it's brown ~ ~ ~
I hope I can help you.
Blessings ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ `