The flat, large ones are about 12 cm in diameter, 2 pieces. The slightly deeper ones are about 9 cm inner diameter, 2 pieces. They feel nice and are beautiful. I have a lot of them, and I don't know which company they're from, but I think they might be from Hyakuchomori, Kawarabe, or Omocha-bako. I don't think the two types are from the same company. #Hyakuchomori #Nikitik #Wooden #Infant #Toddler