Very narrow (length:width ratio 3.1-4.0), early part of spire somewhat cylindrical with rather large, blunt apex, surface glossy, with weak growth-lines only; no spiral thread below the suture; umbilicus narrow or closed. Transparent white with a film-like, faintly yellowish periostracum, often with a rust-coloured line as in previous species. Attains 1 5 mm in length, but usually much smaller.
Ranges from the Pondoland coast to Eshowe, and inland to Spioenkop, Utrecht and Ithala Game Reserve; also reported from the eastern Cape, southern Mozambique and southern Mpumalanga. In leaf-litter and under logs and stones, in a wide range of vegetation types, including riverine woodland, thornveld and Aloe and Euphorbia thicket.
Although the suture may be bordered below by a glassy zone where the whorls overlap, this is not swollen into a ridge as in some other Opeas species. A closely related species or dwarf form of O. crystallinum, described as O. eulimoides (Preston, 1909), occurs together with it in the Weenen-Pietermaritzburg area. This does not exceed 9.7 mm in length and has a slightly narrower protoconch.