Introduction: 1. Size: 100"(H)x144"(W) (254x365cm). Then select the corresponding quantity. 2. You don't need to be professional. Finish it with a friend will be much easier. Do not peel off the entire liner backing at once. Peel off 1 to 2 feet at a time and work your way down. 3. Notes: Colors can vary slightly due to different light and display. The image is only a reference. Due to the manual measurement and different measurement methods, please allow 1-3cm deviation. Thank you for your understanding. 4. Please ensure that the product should be used only on smooth surfaces before stick. The paper is suitable for most rooms except humid environments, like bathrooms. Please wipe it with a damp cloth, then make sure the wall is dry before sticking the wallpaper. We are a professional manufacturer. Wallpapers of any size or style can be customized. If you have any needs, please tell us.