Ko te rohe o te Moana-a-Kiwa e tata ana ki te 2.5 miriona km2 (965,000 sq mi), e tohu ana i te 0.7% o te mata o te moana o te ao, engari ko tana hononga ki te Moana-a-Kiwa na roto i te Strait of Gibraltar <unk> te tahatika kuiti e hono ana i te Moana-a-Kiwa ki te Moana Mediterranean me te wehe i Spain i Uropi mai i Morocco i Awherika <unk> he 14 km (8.7 mi) noa. I roto i te moana moana, i etahi wa ka kiia ko te Moana-a-Kiwa o Eurafrican, te Moana-a-Kiwa o Europi ranei hei wehewehe i nga moana Mediterranean i etahi atu waahi. Ko te hohonu toharite o te Moana-a-Kiwa he 1,500 m (4,900 ft) ana ko te hohonu rawa ka tuhia he 5,267 m (17,280 ft) i te Calypso i te Moana Ionia. E rohe ana te moana ki te raki e Uropi, ki te rawhiti, ki Ahia, ki te tonga ki Awherika e
i te raki e Uropi, i te rawhiti e Ahia, i te tonga e Awherika