As of January 2014, postage for a letter to Germany costs $1.15. This postage allows senders to mail any letter that weighs less than 3.5 ounces and measures less than 11.5 inches by 6.125 inches.
In 2013, the United States Postal Service introduced global Forever stamps worth $1.15, which allow the sender to mail a letter to any country in the world. These stamps are valid for letters and postcards to Germany.
Some letters require additional postage, regardless of weight. Additional postage may be charged for letters that contain bulky objects like pens, have clasps or string closures, or are rigid. Similarly, the USPS requires senders to purchase additional insurance if the contents of the letter are worth more than $400.