United States Postage Stamps, 1890 Domestic Letter Rate: 2 cents per ounce. Domestic First-Class Mail: Up to 1 ounce, $1.40; over 1 ounce but not more than 4 ounces, $1.20; over 4 ounces but not more than 8 ounces, $1.00; over 8 ounces but not more than 16 ounces, $0.80; over 16 ounces but not more than 32 ounces, $0.60; over 32 ounces but not more than 64 ounces, $0.40; and over 64 ounces, free. International First Class Mail: $7.50 for up to 1 ounce, $5.50 for each additional ounce. First-Class Package Mail: $15 for up to 1 pound, $12.50 for each additional pound. Second-Class Mail: From 3 cents per letter up to $1 for each ounce of foreign postage. Third-Class Mail: From 15 cents per letter up to $1 per ounce of foreign postage. Fourth-Class Mail: Unlimited.