The "tetrahedron" is part of a collection of geometrically shaped pillows, scented with lavender! Tetrahedron is made with 100% cotton double gauze fabric by Japanese fabric designer Nani Iro for the outershell. The inner lining is made with 100% cotton batiste. The filling is 100% pure polyester, non allergenic fiber and dried lavender. It is a great decorative pillow for the living room or the bedroom; it's especially nice to sleep with since it is filled with lavender! The medium size is 12" tall. Since it is handmade, height may vary slightly! (Tetrahedron comes in three sizes: 9" tall, 12" tall, and 13" tall.)Also comes in 4 colors: -light grey-yellow-red-cobalt See picture for fabric swatches! *Please pick the color you want and I will make it for you! Please allow one week for making and one week for shipping :)*Would not recommend putting in the washing machine.