The Weld-Blundell Prism is a clay, cuneiform inscribed vertical prism housed in the Ashmolean Museum. The four sides, about 10 cm tall are inscribed in the Sumerian language with lists of Sumerian kings; each side contains the text in two columns.
The museum number is AN1923.444.
References
Weld-Blundell Prism Wikipedia(Text) CC BY-SA