YOU SAID:

The cat cannot fit into the purse because it is too big

INTO JAPANESE

猫は大きすぎるので財布に入れない

BACK INTO ENGLISH

The cat is too big to put in my wallet.

INTO JAPANESE

その猫は大きすぎて財布に入れなくてすむ。

BACK INTO ENGLISH

The cat is too big to put in its wallet.

INTO JAPANESE

その猫は大きすぎて財布に入れなくてはなさ。

BACK INTO ENGLISH

The cat is too big to put in its wallet.