We always recommend adding an extra 5cm to be on the safe side. Please ensure wall is completely clean, no flaking paint, dust etc.. Please see images for installation process. You must follow the instructions shown in the images. There is an overlapping section to align the pattern correctly, please be sure to follow instructions to match the pattern.If DIY is not your strong point then we recommend you get help from someone capable up putting wallpaper/murals. We can not be held responsible for mistakes made by you when applying installation. The item "3D Shabby Modern Minimalist Chic Wall Mural Wallpaper Living Room Bedroom Lounge" is in sale since Monday, August 24, 2020. This item is in the category "Home, Furniture & DIY\DIY Materials\Wallpaper, Tools & Accessories\Wallpaper Murals". The seller is "the-fashion-hub" and is located in Hong Kong. This item can be shipped worldwide.