Most commercially-produced postcards measure approximately 4.21 inches by 5.47 inches. Less commonly, smaller postcards are typically 3.5 inches by 5.5 inches, close to the minimum size the USPS allows. More »

For mail sent through the U.S. Postal Service, postcards must be at least 3.5 inches high by 5 inches long by 0.007 inch thick and no bigger than 4.5 inches high by 6 inches long by 0.016 inches thick. The standard-size ... More »

www.reference.com Business & Finance Mail & Shipping Postal Services

The current postage rate for a standard size postcard is 34 cents. This rate is as of January 2015 according to the United States Postal Service website. More »

www.reference.com Business & Finance Mail & Shipping

The average size of a standard postcard is 4 inches high by 6 inches wide. In the United States, a postcard of this size can be mailed under a special First-Class rate. More »

A standard postcard measures 6 inches wide by 4.125 inches high, which is the maximum size allowed by the United States Postal Service to qualify for first-class mail postcard rates. The USPS postcard minimum size is no ... More »

www.reference.com Business & Finance Mail & Shipping

As of January 27th, 2015, the U.S. postage rate for a postcard is 34 cents. Since the postal service was formed in 1971, stamp prices have generally stayed consistent with the 4.2 percent average annual rate of inflation... More »

www.reference.com Business & Finance Mail & Shipping Postal Services

As of June 2014, the United States Postal Service states that the cost to send a standard sized postcard is 34 cents. At this rate, the postcard can be 6 inches long, 4 1/4 inches high and 0.16 inches thick. More »