1972T oil filter housing fittings/seals

[47silver]

i did a search and found that the seal size was stated to be 22 x 27 for the fitting seals, and it was stated to be the same size as the fitting on the engine that connects to the oil line.
however i measured it and the id appears to be about 26 mm and od about 32,,
am i missing something, i veried that the micrometer is accurate.
in any case does anyone know what size seal to get?
if it for the oill filter housing fittings on a 72.
thanks