May 11 (Bloomberg) -- The price of a first-class stamp will increase one penny to 42 cents tomorrow, the U.S. Postal Service said in a reminder on its Web site.

Prices for other mailing services, including standard mail, periodicals, package services and special services, will also increase tomorrow, the Postal Service, an independent federal agency, said. The agency first announced the price increase on Feb. 11.

Forty-two-cent stamps will be required on first-class mail weighing an ounce (0.02 kilograms) or less, while first-class mail weighing as much as two ounces will increase 1 cent to 59 cents, the Postal Service said.

The last first-class mail increase was in May 2007, to 41 cents from 39 cents.

To contact the reporter on this story: Dan Hart in Washington at dahart@bloomberg.net.

Last Updated: May 11, 2008 12:08 EDT