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  2. ISO 216 - Wikipedia

    en.wikipedia.org/wiki/ISO_216

    All ISO 216, ISO 217 and ISO 269 paper sizes (except some envelopes) have the same aspect ratio, √ 2:1, within rounding to millimetres. This ratio has the unique property that when cut or folded in half widthways, the halves also have the same aspect ratio. Each ISO paper size is one half of the area of the next larger size in the same series ...

  3. Philippine Postal Corporation - Wikipedia

    en.wikipedia.org/wiki/Philippine_Postal_Corporation

    The Philippines eventually joined the Universal Postal Union, this time as a sovereign entity, on January 1, 1922. 2017 stamp dedicated to the 25th anniversary of the corporation The Manila Central Post Office building, the headquarters of the Bureau of Posts, was constructed in its present-day Neo-Classical style in 1926.

  4. List of most expensive philatelic items - Wikipedia

    en.wikipedia.org/wiki/List_of_most_expensive...

    The current record price for a single stamp is US$9,480,000 paid for the British Guiana 1c magenta. [1] [2] This list is ordered by consumer price index inflation-adjusted value (in bold) in millions of United States dollars in 2023. [note 1] Where necessary, the price is first converted to dollars using the exchange rate at the time the item ...

  5. Postage stamps and postal history of the Philippines

    en.wikipedia.org/wiki/Postage_stamps_and_postal...

    Following the occupation of the Philippines by the United States as a result of the Spanish–American War, the American military government issued regular stamps overprinted with the word "Philippines", for postal purposes. Stamps issued on June 30, 1899, were used up to August 1906, when the American civil government that supplanted the ...

  6. Paper size - Wikipedia

    en.wikipedia.org/wiki/Paper_size

    B4, B5, and B6 are used for envelopes that will hold C-series envelopes. B4 is quite common in printed music sheets. B5 is a relatively common choice for books. B7 is equal to the passport size ID-3 from ISO/IEC 7810. Many posters use B-series paper or a close approximation, such as 50 cm × 70 cm ~ B2.

  7. International reply coupon - Wikipedia

    en.wikipedia.org/wiki/International_reply_coupon

    In the United States in November 2012, the purchase price was $2.20 [6] USD; however, the US Postal Service discontinued sales of IRCs on 27 January 2013 due to declining demand. [7] Britain's Royal Mail also stopped selling IRCs on 31 December 2011, citing minimal sales and claiming that the average post office sold less than one IRC per year.

  8. Aerogram - Wikipedia

    en.wikipedia.org/wiki/Aerogram

    An aerogram, aerogramme, aérogramme, air letter or airletter is a thin lightweight piece of foldable and gummed paper for writing a letter for transit via airmail, in which the letter and envelope are one and the same. Most postal administrations forbid enclosures in these light letters, which are usually sent abroad at a preferential rate ...

  9. Manila folder - Wikipedia

    en.wikipedia.org/wiki/Manila_folder

    A manila folder with a paperclip. A manila folder (sometimes referred to as manilla folder) is a file folder designed to contain documents, often within a filing cabinet.It is generally formed by folding a large sheet of stiff card in half.