Postage can increase or decrease over time.
In 2017, the First Class International rate would be $1.15 if the envelope is standard size (not square or over 11 inches long) and weighs less than one ounce.
In 2017, the First Class International letter rate for a letter less than one ounce was $1.15 USD. There is a surcharge for oddly shaped envelopes, for a total of $1.36 USD.
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12.00
58 cents
How much postage is required for a 6x8 inch card? It weighs less than 1 ounce.
33 cents for 2013
It depends on the weight of the letter, If it is 1 Oz. postage is 98 cents
One cent
about 63 cents