YOU SAID:

i am bigger than a normal sized cow

INTO JAPANESE

私は通常のサイズの牛よりも大きいです

BACK INTO ENGLISH

I'm bigger than a normal size cow

INTO JAPANESE

普通のサイズの牛よりも大きいです

BACK INTO ENGLISH

Larger than a normal size cow

INTO JAPANESE

通常サイズの牛よりも大きい

BACK INTO ENGLISH

Larger than a normal size cow