YOU SAID:

I have a black suit that fits well

INTO JAPANESE

私はよく合う黒のスーツがあります。

BACK INTO ENGLISH

I have a well fitted black suit.

INTO JAPANESE

良く整った黒のスーツがあります。

BACK INTO ENGLISH

Well fitted black suit.

INTO JAPANESE

黒のスーツが合います。

BACK INTO ENGLISH

Goes well with the black suit.

INTO JAPANESE

黒のスーツとよく合います。

BACK INTO ENGLISH

Goes well with the black suit.