Material: Since it's made of 100% pre-washed cotton, it's pre-shrunk. Dimension: Twin Size: Duvet Cover (1 piece): 68"W x 90"L; Pillow Shams (Standard 1 piece): 20"W x 26"L Full Size: Duvet Cover (1 piece): 80"W x 90"L; Pillow Shams (Standard 2 pieces): 20"W x 26"L Queen Size: Duvet Cover (1 piece): 90"W x 90"L; Pillow Shams (Standard 2 pieces): 20"W x 26"L King Size: Duvet Cover (1 piece): 104"W x 90"L; Pillow Shams (Standard 2 pieces): 20"W x 36"L Cal King Size: Duvet Cover (1 piece): 104"W x 98"L; Pillow Shams (Standard 2 pieces): 20"W x 36"L Oversized King Size: Duvet Cover (1 piece): 120"W x 98"L; Pillow Shams (Standard 2 pieces): 20"W x 36"L Convenience: The duvet cover is designed as a removable cover for your duvet/comforter (sometimes even for your quilt). It can be removed and laundered as often as the bottom sheet and pillow cases. This keeps the duvet fresh as well. Duvet covers from MooMee feature zip closure and four interior corner ties to keep the cover secure.