These are chawanmushi (savory egg custard) bowls. I've used them a few times, but they don't fit my steamer, so I'm selling them. The bowl's mouth diameter is about 8.5cm, and the height is about 6.5cm. The height with the lid on is about 8cm. I think they are still usable, but they are used items, so I recommend them to those who don't mind.