California King beds sheets are the largest size we sell, providing you with a spacious and luxurious sleep space with the highest quality mulberry silk. The luxurious California king mattress is 72 inches wide and 84 inches long. A California king fitted sheet should be the same size. The flat sheet can be the same as a king, 102 inches wide by 112 inches long. The duvet can also have the same measurements as a king, at 96 inches by 109 inches. Mattress – approximately 72” x 84” or 183 x 213 cm Fitted sheet – approximately 72” x 84” or 183 x 213 cm Flat sheet – approximately 102” x 112” or 259 x 284 cm Duvet cover – approximately 96” x 109” or 244 x 277 cm Bed skirt – approximately 72” x 84” or 183 x 213 cm