Antique Chastagner C Limoges France Gold Encrusted Large Tea Coffee Cup Saucer. To the rim is 12 ounces, so probably 10 ounces comfortably? Looks to be in great condition. This is a very large tea cup.
As you can see in the photo the saucer is about 7" and the cup is about 5" wide. There is some sticker residue on the saucer and the underside edges show wear. Please refer to the photos. I'm happy to provide more photos if needed.