WASHINGTON, D.C. — The cost of mailing a first-class letter went up by a penny Sunday, to 46 cents, while the price of a postcard increased from 32 cents to 33 cents.

A new global “forever” stamp now allows customers to mail letters anywhere in the world for one set price of $1.10. Currently, the prices for international letters vary.

The increase will make only a small dent in the U.S. Postal Service’s financial losses of $15.9 billion.