Jonah's second call to preach to Nineveh, although reluctantly & grudgingly obeyed, results in the wholesale conversion of the heathen city. Exceedingly great city; excavations have revealed a city about three miles in length & somewhat less than one & one-half miles wide. The message of the story, not the size of the city, is of primary import.
Again Jonah is a successful missionary in spite of himself. Sackcloth & ashes, traditional signs of mourning & repentance. The pagan king sets a better4 example than Jonah. Repentance & deliverance are themes, dominating the story of Jonah & its use in the New Testament.
Reference summary used from The New Oxford Annotated Bible with The Apocrypha Expanded Edition, An Ecumenical Study Bible, RSV