They are also called the "Lemola" Archipelago, from the initial two letters of each of the three main islands, Letti, Moa and Lakor; each of the three islands now constitutes a separate administrative district (kecamatan) within the Maluku Barat Daya Regency (Kabupaten Maluku Barat Daya) The islands cover 564.30 square kilometres (220 sq mi) in area and supported a population of 16,664 at the 2010 Census, which had increased to 26,870 at the 2020 Census; the official estimate as at mid 2023 was 30,837.

Industries include the cultivation of rice, coconut palms and tobacco, animal husbandry, and fishing.

Letti proper, the westernmost island, covers 90.10 km2 and had a population of 9,019 in mid 2023.

Moa, the central and largest island, covers 361.60 km2 and had a population of 18,953 in mid 2023.

The town of Tiakur is the administrative centre for the Regency; it has an area of 45.43 km2 and had a population of 3,546 at the 2020 Census.