This TecNiq S21 Amber Submersible LED Side Marker Light measures approximately 2 inches x 1.15 inches x .65 inch. The Trailer Side Marker Light is a Flush Mount Design that features an impact resistant casing that is also protected from UV, making it a fantastic fit for boats or marine trailer use. The LED in this light and many other TecNiq lights are exceptionally bright and exceed the minimum required light brightness specs for trailer and boat lights. This light does not come with mounting hardware.