This is an Akashino chawan (tea bowl). It is 7.2 cm tall and has a mouth diameter of about 10 cm. It feels small for a matcha tea bowl, but I am a novice and don't know for sure. I received it from my grandfather, who loved Shino ware. The artist is unknown, and there is no box. The petrified wood and other items in the photo are not included; this listing is for the tea bowl only. Thank you.