I had the opportunity to walk by the UN headquarters today, and I’m afraid that this is incorrect with respect to Switzerland. All of the flags, including the Swiss flag, appeared to be the identical size and proportion (apparently the 4’ x 6’ size noted above). Nepal’s flag, being the only non-rectangular (or square) flag was the only exception. Although it was kind of bunched up on the flagpole and I couldn’t see its full dimensions, it appeared to have the same hoist length as all of the other flags.