On 5 March 2013, UNPA will issue a new US$ 0.46 pre-stamped envelope in both standard and large sizes and a US$ 1.10 air letter. The postal stationery was designed by Sergio Baradat (United Nations).
Small Envelope: 165 mm horizontally by 92 mm vertically
Large Envelope: 240 mm horizontally by 116 mm vertically
Air Letter: 292 mm horizontally by 215 mm vertically
Joh. Enschede Stamps Security Printers B.V. (Netherlands)
Small Envelope: 17,000
Large Envelope: 18,000
Air Letter: 17,000