An identification marker or tag for wires and other elongated objects is described. In one embodiment, the marker has a generally elongated shape, e.g., an elongated oval, and comprises a surface for bearing indicia and two holes, one hole located near each end of the marker. Each hole is connected to an edge of the marker by a slot or cut that is adapted for ease of clipping the marker onto a wire. The marker is dimensioned in length and width to display text in the font size desired to maximize legibility.