single diffused rectangulat green LED Face dimensions: 1.8 x 5.5mm nominal (1.76 x 5.4 actual) 8mm high including a 6.14mm (down from top face) step to 1.9 x 5.5x 4.0mm depth. Designed to be placed end to end to build up a continuous thin line. Could also be placed sided to side leaving a 2mm gap between faces