Cheyenne Porcelain Diffuser- Siberian Fir. Diffuser Dimensions: 5.5 in X 6 in X 8 in 13.97 cm X 15.24 cm X 20.32 cm Box Dimensions: 5.5 in X 6 in X 10 in 13.97 cm X 15.24 cm X 25.4 cm Oil Volume: 100 ml // 3.4 oz