Correction for the size of a Postage Stamp
Thanks for your input! Let us know more about what's wrong in the form below.
How big is 2,640 square millimeters?
It's about seven times as big as a Postage Stamp
The size of a Postage Stamp is about 400 square millimeters.
(average; United States dimensions)
A typical postage stamp measures an average of 400 sq. mm. One of the most prized stamps among collectors is the US-issued "Inverted Jenny" stamp printed in 1918, which features an upside-down image of Curtiss JN-4 ("Jenny") airplane; a single stamp sold for $977,500 at a 2007 auction.