Again, the US permitted only two standardized sizes of rectangular sealed-beam lamp: A system of two 200 mm x 142 mm high/low beam units corresponding to the existing 7" round format, or a system of four 165 mm x 100 mm units (two high/low and two high-beam) corresponding to the existing  round format.
The US allowed only two standardized sizes for rectangular sealed-beam lamps: A system of two 200 mm x 142 mm high/low beam units matching the existing 7" round format, or a setup of four 165 mm x 100 mm units (two high/low and two high-beam) corresponding to the same round format.