This species' solid, ovate-conical, ventricose shell is very pale, white, yellowish or reddish. In life, the shell is covered in a bright, yellowish-brown periostracum. The spire contains seven or eight whorls. These are convex and crossed by oblique folds, thick and waved. The shell surface has a sculpture of vertical, wavy folds (hence the name "undatum", which means wavy). The wavy folds are crossed by numerous incised, very prominent spiral lines, some of which are paired. The white and very large aperture of the shell is broadly oval and tapers to a deeply notched siphonal canal. The outer lip is arched.