- In 1973 Bhutan issued a stamp that looked like a record. Put it on a record player and it would actually play the Bhutanese national anthem.
- The smallest-ever stamp – 9.5 x 8mm – was issued in 1863 by the Columbian state of Bolivar.
- The Pacific island of Tonga once issued a stamp shaped like a banana.
- Cats were used for a mail service in Liege, Belgium, in 1879. In all, 37 cats were employed to carry bundles of letters to villages within a 30km radius of the city centre. The experiment was short-lived as the cats proved to be thoroughly undisciplined.
- The first person other than a head of state (living or dead) to appear on a stamp was Benjamin Franklin whose portrait featured on the 10c stamp issued by the United State in July 1847.