how big is kangaroo island
A Big Island-As the third largest island off the coast of mainland Australia, Kangaroo Island is more than a day-trip destination. At 155 kilometres long and up to 55 kilometres wide, it covers an area of 4,416 square kilometres.angaroo Island (or âKI' as the locals call it) is also big and surprisingly diverse. If you traverse its 155km length you'll find soaring cliffs, dense bushland, towering sand dunes, wetlands and massive arcs of bone white beach.