How many stamps for a 10 oz envelope 7x11?

The number of stamps required for a 10 oz envelope (7x11 inches) depends on the postage rates set by the postal service. As of my last update, for domestic mail in the U.S., a 10 oz envelope typically requires a minimum of $5.00 in postage. You can use one or more stamps to reach this amount, depending on the denominations of the stamps you have. It's best to check with your local postal service for the most accurate and current rates.