YOU SAID:

I cannot walk as my shoes are way too big

INTO JAPANESE

私は靴が大きすぎるので歩けない

BACK INTO ENGLISH

I can't walk because my shoes are too big.

INTO JAPANESE

靴が大きすぎるので歩けなくてはなりません。

BACK INTO ENGLISH

My shoes are too big to walk.

INTO JAPANESE

私の靴は大きすぎて歩けないです。

BACK INTO ENGLISH

My shoes are too big to walk.