The size is standard 6 ¼" x 4 ½", postally used. The obverse shows two canceled postal stamps: a 1963 stamp with the first woman cosmonaut Valentina Tereshkova with the dates of her flight, 16-19 April 1963, and a stamp with the image of cosmonaut Pavel Belyaev and the dates of his flight, 18-19 March 1965. The obverse also has a rectangular registered mail stamp and two cancels dated 28 September 1965. The stamp in purple ink at the bottom was apparently applied to register receipt of the letter in Branch #6732 of the Savings Bank of the USSR. The postal cancel on the verso is also dated 28 September 1965. The cover is cut open along the top edge.

In excellent condition: all the stamps and the typewritten address on the obverse are clear and perfectly legible.