There is described an eddy current array probe for detection and depth sizing of a surface-breaking defect in a metallic material, said eddy current array probe comprising: a probe body comprising a plurality of probe elements arranged in a linear configuration, the probe elements each comprising at least one coil, the probe body being adapted to be displaced along a surface of the metallic material so that a longitudinal axis of the coil be parallel to the surface of the metallic material, the coil, when in use, being adapted to induce an eddy current within the metallic material detect the eddy current; and a set of active elements of the plurality of probe elements being adapted to be selectively operated at a plurality of time-spaced instances.