Abstract: A tool for measurement of a body is proposed. It includes a caliper furnished with a slider, a fixed finger, a moving finger, and accessories including a first clamp mounted on the fixed finger, a first measuring standard associated with the fixed finger, a fixed leg having a first measuring face and a head securing the first measuring standard, a second clamp mounted on the moving finger, a second measuring standard associated with the moving finger, a moving leg having a second measuring face and a head securing the second measuring standard therein. The first measuring face is disposed to contact a first point of the body and, moving the slider, the second measuring face is disposed to contact a second point of the body, providing for measuring a length between the points, generally being greater than the caliper's length. The tool may additionally have intermediate measuring standards.