Even though I keep my eyes open most of the time, I never knew that such small envelopes were accepted in the mail a half century ago. The smallest envelope in the image - 3 1/2 inches long by 2 5/8 inches high - was mailed in 1954 for 3 cents. The United States Postal Service [1] won't accept such an envelope today. The tiny envelope is a little larger than a standard business card. Perfect for a Valentine's Day message - don't you think!
With postage costs going up, and the lines at the post office counter getting longer, and email becoming more and more ubiquitous - when do you think the USPS will go out of business?
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