This is a handmade glass obi-dome (sash clip) created by melting glass with a tabletop burner at 1400 degrees Celsius. Blue and white glass have been combined in a marbled pattern. The size is approximately 2.2cm in height and 2.2cm in width. #nonohana's obi-dome list High-quality domestic glass is used for the glass material. Because the glass is glossy and transmits light, the color of the actual product may differ slightly from the photos. Please understand this before purchasing.