Vintage Glass Pyrex Custard cups Set of 5 #425 custard cups or ramekins with old mark 3"d. x 2 3/8" tall - These measure approximately 3" in diameter x 2 3/8" tall, and they are in very good condition for their age. There are no cracks, chips, or fog. The bottom of the cups have the old circle mark, which Pyrex used in the early 1910s, and I believe this actual custard style #425 was discontinued in 1917.