In general terms, the invention provides a circuit for delivering an electromagnetic signal to a human or animal body via contact with the skin of the body. The circuit comprises a plurality of printed layers provided on a base. The plurality of printed layers includes a first printed layer, and a second printed layer having a portion that overlays the first printed layer and a portion that overhangs the first printed layer. Optionally the portion that overhangs the first printed layer contacts the base or another of the printed layers of the plurality of printed layers.