100% Pure Silk Pillowcase Queen / Standard 19mm (Single, White) 100% Silk Imported Strong 19 momme weight mulberry silk that is machine washable Generous dimensions for added comfort and utility Pillowcase is 20" x 31", fits Standard/Queen size pillows Natural silk made without bleach for a safe and comfortable sleep An internal pocket keeps your pillow in place while allowing use of both sides of the pillowcase