Dark-glazed jars of this type, decorated with vertical ribs of trailed white slip, were produced in various sizes and shapes at a number of Cizhou kiln sites in Shandong, Henan and Hebei provinces. A related small jar in The British Museum is illustrated in Oriental Ceramics, The World's Great Collections, vol. 5, Tokyo, 1981, no. 122. Compare, also, the related small jar illustrated in the catalogue for the exhibition, Heaven and Earth Seen Within: Song Ceramics from the Robert Barron Collection, New Orleans Museum of Art, 2000, p. 88, no. 29.