This is a SET OF TWO Global International First Class Stamps * In August 2018 the USPS issued this Global Poinsettia Stamp. One stamp can be used to mail a 1 ounce letter to any country to which First-Class Mail International service is available. This is a SET OF TWO Global International First Class Stamps One stamp can be used to mail a 1 ounce letter to any country to which First-Class Mail International service is available.