The Wafer is only 0.3" thick. The tracing area measures 32cm x23 cm - easily fits A4. The Wafer has dimmable LEDS and provides an even spread of light from edge to edge. It is powered by Mains/AC Adapter and is very low heat. Wafer is ideal for calligraphy, stencilling, scrap-booking, embossing, quilting, embroidery, sewing, and much more. 12.5"x 9" Tracing area.