A sidelite is a window, usually with a vertical emphasis, that flanks a door or a larger window. They are narrow, usually stationary and found immediately adjacent to doorways. Sidelites are available in widths of 12" and 14" and the height of the entry door.
American Classic Sidelites
A transom is a framed glass assembly mounted atop a door assembly. Transoms are rectangular in shape or have curved or arched tops. They are available in 12" and 14" heights by the door widths.
American Classic Transoms