Isometrus is a genus of scorpion belonging and being eponymous to the family Buthidae.

[3] The species of this genus are found in south and southeast Asia and in Oceania, with the exception of Isometrus maculatus which is pantropical.

They are medium sized buthids, where the adults have a body length of 30 to 75 mm.

Chelal trichobothrium db is located between dt and et.

Movable and fixed fingers of pedipalps consists with six rows of granules.