The product described is an antique postcard featuring Grand Duchesses Olga and Maria Nikolaevna of Russia. The postcard is a Real Photo (RPPC) from the era of 1900-1919, manufactured in Germany. It measures a standard size of 5.5 x 3.5 inches and includes a divided back, made of cardboard and paper. The postcard was posted in 1910, adding to its historical value as a collectible piece from this time period and featuring the prominent figures of the grand duchesses.