YOU SAID:
Imanol had a big head
INTO JAPANESE
イマノールは頭が大きかった
BACK INTO ENGLISH
Imanol was big head
INTO JAPANESE
イマノールは大きな頭でした
BACK INTO ENGLISH
Imanol was a big head
INTO JAPANESE
イマノールは大きな頭でした
BACK INTO ENGLISH
Imanol was a big head
That didn't even make that much sense in English.