According to the U.S. Postal Service, the cost of sending a letter to Mexico depends on the weight of the envelope. Postage for a letter weighing up to 3.5 ounces costs between $1.15 and $2.86. Three to six 49-cent stamps are necessary for a letter.
A 1-ounce or less letter sent via First-Class International Mail costs $1.15, a 2-ounce letter costs $1.72, a 3-ounce letter costs $2.29, and a 3.5-ounce letter costs $2.86. This assumes that no specialised postal services are necessary. Postage for a postcard to Mexico costs $1.15. The precise number of stamps required can be determined by dividing the shipping cost by the cost of a stamp; a First-Class Mail stamp costs 49 cents. Additionally, it is possible to acquire the correct amount of postage at the post office in order to prevent overspending.