Ko e ongo kiʻi motu ʻi he vahaʻa ʻo Haʻapai mo Tongatapu, tuʻu ʻi he tuʻahivi fakamoʻungaafi ʻo Tonga. Ko Hunga Tonga ʻi hahake, ko Hunga Haʻapai ʻi hihifo, kae mahalo pē ʻoku na fakafetongi. ʻEna lōloa takitaha ko e kilomita ʻe 2, ʻena mamaʻo ko e kilomita ʻe 4. Ko Hunga Tonga hono māʻolunga ko e mita ʻe 149, ko Hunga Haʻapai ko e mita ʻe 128.