The product is double sided. you can use the pillows and duvet cover either the red side or the dark gray side. the fitted sheet is only one-sided, dark gray in color. colors may differ depending on the light. pillow size: 50 x 70 cm. it fits standard pillow sizes. the duvet cover has a zipper. .duvet size: 225 x 200 inner sheet is elastic. inner sheet color is dark gray. product colors may look different due to light. sheet size: width: 2.40, length 2.80, depth 35 cm Improved version for clearer understanding and better search visibility. Suitable for users seeking detailed and reliable product information.