This has been displayed at my parents' house for over 20 years. I'm not sure if it's a type of bracket fungus (Saranokoshikake) or a Ganoderma mushroom (Mannendake). I was told it was valuable. I would like to give it to someone who knows its value. The large one is approximately 29 cm wide and 25 cm tall (excluding the base). The inside is 18 cm wide and 13 cm tall. The small one is approximately 15 cm wide and 11 cm tall. Please use these measurements as a general guide.