よく似合っていること
the state of something being well-matched
the degree to which something is well-matched
“Let beggars match with beggars.”【イディオム・格言的】
本当によく似合う。
the condition of being well-matched
Looks good on you.
(頭なら)a shapely head―(口なら)―a well-formed mouth―(姿なら)―a well-proportioned figure―(上衣なら)―a well-cut coat
それよく似合ってるよ。
どれが似合うと思う
You're right, it fits.
Foreign clothes become you better (than Japanese).