Looks good on you.
よく似合っていること
the state of something being well-matched
“Let beggars match with beggars.”【イディオム・格言的】
You're right, it fits.
それよく似合ってるよ。
どれが似合うと思う
Foreign clothes become you better (than Japanese).
That looks good on everyone.
That suits everyone.
I'm often told I don't look good in a skirt.
That skirt looks good on you.