YOU SAID:

big brother it won't fit

INTO JAPANESE

お兄ちゃん合わない

BACK INTO ENGLISH

Oniichan doesn't fit.

INTO JAPANESE

お兄ちゃんが合わない

BACK INTO ENGLISH

Oniichan doesn't suit me.

INTO JAPANESE

お兄ちゃんに似合わない

BACK INTO ENGLISH

It doesn't suit your brother.

INTO JAPANESE

兄貴には似合わない

BACK INTO ENGLISH

It doesn't suit my brother.

INTO JAPANESE

兄には合わない。

BACK INTO ENGLISH

It doesn't suit my brother.