Fine high-fired white wares of this type were made at both the Xing kilns in Hebei province and the Gongxian kilns in Henan. Similar cups dated to the Sui dynasty have been excavated at the site of the Xing kiln and are illustrated in Wenwu 1987:9, pp. 4-5, figs. 6 and 10-4. The present cup, however, is of unusually large size. One of comparable size (12.9 cm.) was sold in these rooms, The Falk Collection I, 21 September 2001, lot 10. See, also, the pair (12 cm. diam.) illustrated in the catalogue of the Charles B. Hoyt Collection Memorial Exhibition, 1952, p. 37, no. 142.