ProductLetters (1 oz.)Letters additional ouncesLetters (metered 1 oz.)Outbound International Letters (1 oz.)Domestic Postcards ProductSmall Flat Rate BoxMedium Flat Rate BoxLarge Flat Rate BoxAPO/FPO Large Flat Rate BoxRegular Flat Rate EnvelopeLegal Flat Rate EnvelopePadded Flat Rate Envelope Current63 cents20 cents53 cents$1.3040 cents Current$9.45$16.10$21.50$20.00$8.95$9.25$9.65