There are a few things to consider when mailing a CD. The weight of the CD, the thickness of the envelope, and the destination of the package all play a role in how many stamps are required.
As of 2016, it costs 71 cents to mail a CD domestically. If the CD weighs less than 1 ounce, then a single stamp will be sufficient. If the CD weighs more than 1 ounce but less than 2 ounces, then two stamps will be required. If the CD weighs more than 2 ounces, then three stamps will be required.
CDs can also …