A sheer curtain with dimensions of 55x84 inches is a popular and versatile window treatment designed to enhance the ambiance of a room without sacrificing light. The 55-inch width is standard for a single panel, while the 84-inch length is ideal for windows where the curtain is intended to reach the floor, offering a sophisticated and elongated look. For a fuller, more pleated appearance, multiple panels can be used to cover the width of a window.