Mailing a letter just got more expensive. As of today, the cost of a first-class stamp rose to 46 cents.

The U.S. Post Office announced that stamp prices would increase one cent to make way for the new 46-cent Forever stamp.

The price to mail a one-ounce letter will increase from 45 cents to 46 cents. Adding a little weight to that letter will cost the same, rising 20 cents for each additional ounce.

The announcement states letters under one ounce mailed anywhere internationally will cost $1.10 and postcard stamps will also see a one-cent increase, from 32 cents to 33 cents.

Highlights of the new single-piece First-Class Mail pricing, effective Jan. 27, 2013 include:

• Letters (1oz.) — 1-cent increase to 46 cents
• Letters additional ounces — unchanged at 20 cents
• Letters to all international destinations (1oz.) — $1.10
• Postcards — 1-cent increase to 33 cents

If you've still got some of those 45-cent Forever stamps bought before the price hike, don't worry. They are still good without adding any additional postage.

Local Post Offices

United States Post Office – Old Milton Parkway

United States Post Office – Webb Bridge Road

Shipping stores, grocery stores and even some banks sell postage stamps as well.