Abstract: In accordance with the present invention, there is provided a clip for use with a tape measure comprising a generally U-shaped channel sized to permit a standard tape measure to be retained in the channel. The channel is provided with a horizontal slot cut in the lower edge of opposite sides of the channel adjacent one end. The slots are sized to permit the ruler of a square or other straight edge to be inserted and held in place between the bottom of the tape measure and the floor of the channel. This configuration permits the square and tape to move as one, so that the tape may be read as it passes over the outside edge of the edge of the blade of the square and a mark may be scribed at any point across the top of the material without hindrance and the user will have one hand free to scribe the mark.