Consider combining decorative elements such as artwork, mirrors, and shelving to decorate a blank small wall. Hang a collection of small frames or photos to make a gallery wall, or use floating shelves to display small decorative objects like plants, candles, or figurines. Another option is to add pattern or texture to the wall with a small piece of wallpaper or a stencil. Lighting such as sconces or string lights can also add a warm and inviting atmosphere to a small blank wall.