This pair of cups is unusual in the straight rim and relatively small size. A number of other Jiajing yellow-enamelled bowls, with reign marks incised or written in underglaze blue, have been published but they are all larger in size and are of bell-shape with flaring rims. Compare a pair of bowls with a wide everted mouth rim (7.5 cm. diam.) in the collection of the Palace Museum, Beijing, illustrated in Monochrome Porcelain, The Complete Collection of Treasures of the Palace Museum, Hong Kong, 1999, pl. 44.