Sten has gentle monochrome tones with depth and lustre, lovely on its own or combined with another pattern from the collection. Single-coloured wallpaper with a mat surface which gives the room a soft feel. Design: Studio Sandberg Sten light grey Wallpaper (583-11) Wallpaper by European Design House Sandberg Wallpaper from the Oas Collection. Designer Wallcoverings offers luxurious wallcoverings with samples and purchasing in the USA for over 25 years. We are thrilled to offer these collections to the interior design community. Let's create together.