How Much is It to Mail a Letter?

The cost to mail a letter using first class mail will depend on the weight and shape of the envelope. It is 44 cents for the first ounce, with 62 cents over 1 ounce up to 2 ounces and up to 3.5 ounces it is 95 cents. The envelop should not exceed 11 1/2 inches in length, 5 inches in thickness and 6 1/8 inches in height. Look here for more information: