The image appears to be a flag or banner. The basic shape is a rectangle with the long sides standing vertically. At the bottom instead of a straight line to close the rectangle the center point of that line dips up like a triangle is missing from the bottom of the rectangle.
Related to Bookmark Icon
Related icons are the icons with matching tags, as well as all popular icons. All icons are in the same flat style. You can either download free PNG icons or buy SVG vectors