They range in surface area from the largest , São Miguel , at 759 km2 ( 293 sq mi ) to the smallest , Corvo , at approximately 17 km2 ( 7 sq mi ) .
Their individual areas vary between 759 km2 ( 293 sq mi ) of the largest island ( São Miguel ) to 17 km2 ( 6.6 sq mi ) of the smallest ( Corvo ) .