YOU SAID:

I wish my head was the size of a tomato

INTO JAPANESE

私は私の頭は、トマトのサイズ希望します。

BACK INTO ENGLISH

I my head size like tomatoes.

INTO JAPANESE

私は私の頭のサイズはトマトが好き。

BACK INTO ENGLISH

I love tomatoes the size of my head.

INTO JAPANESE

私の頭の大きさのトマトが大好き。

BACK INTO ENGLISH

I love tomatoes the size of my head.