Seamless silk sheet sets made from 100% habotai silk. These sheets are woven on a larger loom producing seamless sheets and are a heavier 15 momme weight. You can feel the extra luxury. The fitted sheet has a deep 15 inch pocket that fits most bed types - even ones with pillow tops. As silk is finer than cotton it is measured by momme weight. DreamSacks seamless silk sheets are a very strong, thick silk and are wonderful to the touch. They are also breathable and hypoallergenic. This is a set you will love! Easy care - machine wash gentle in cold water with like colors, do not bleach. Tumble dry low and remove from the dryer promptly. Each Queen, King and California King set includes four pieces. Twin only has one pillowcase and 3 total pieces. Queen - Fitted bottom sheet: 60" X 81" with 15" pocket and universal elastic to fit a wide range of mattresses; Flat sheet: 90" X 110", and two Standard Pillowcases: 21 X 32". King - Fitted bottom sheet: 78" X 80" with 15" pocket with universal elastic to fit a wide range of mattresses; Flat sheet: 108" X 115", and two King Pillowcases: 21 X 42". California King - Fitted bottom sheet: 72" X 84" with 15" pocket and universal elastic to fit a wide range of mattresses; Flat sheet: 108" X 115", and two King Pillowcases: 21 X 42".