Shell size to 10 mm; shell biconical. Periphery angled. Sculpture of 7-10 axial ribs crossed by numerous fine spiral striations. Aperture comprising 1/2 of shell length. Color white with reddish-brown spiral band. Similar to K. rubella (Kurtz & Stimpson, 1851) from eastern Florida, from which it differs by being a stouter shell, with a shorter spire.