Usps Rates 2024 Large Envelope Rates. Get tips on reducing mail costs and adapt to postal. The baseline postage rate to mail a flat/large envelope has increased from $1.35 to $1.39 in postage, but the price for each additional ounce also stayed the same.

The card price applies to each single or double postcard when originally. Stay ahead with insights into the changing costs for your mailing needs.