Mailing a letter costs more starting Sunday, as new postage rates go into effect.

It will cost 25 cents to mail first-class letters, up 3 cents.

The second ounce of first-class mail also rises 3 cents, to 20 cents.

But postal cards are up only a penny, to 15 cents.

The rate increases cover most classes of mail, with larger hikes for advertising and periodicals than for letters.