|Initial United States postage rates were set by Congress as part of the Postal
Service Act. History of United States domestic first class & postcard rates, 1863–
present (USD) . Cost of First-Class™ Stamps. Letter Stamps Standard-sized, rectangular
envelopes From $0.49. Square, Oversized, or Unusual Envelopes From $0.70.
Postcard . Postcard Size, Quantity, Price, Cost. First-Class Mail® Stamped Large Postcards.
Maximum size: 11-1/2 inches long by 6-1/8 inches high by 1/4 inch thick. $0.49 . Each additional ounce will cost $0.21. First Class Mail Flats (1 oz.) will increase
from $0.94 to $0.98. Each additional ounce will cost $0.21. Postcard rates will . Metered Mail/Stamps.com Rate, $0.460. First Class Mail Letter - each additional
ounce, $0.21. Postcard, $0.34. First Class Mail Flat (1 oz.) $0.98. First Class Mail
. USPS First Class postcards are a low cost method to send marketing materials to
your customers. Stamps.com allows you to easily buy postcard postage.Presorted First-Class Mail Letters/Postcards: There's an overall average price
decrease of 0.25 percent, although many presort prices are increasing. Mailers . Jan 22, 2017 . For your convenience, Stamps.com will be updated automatically to reflect the
new rates. First-Class Letters, Postcards, and Flats The following . Bulk Rate Postcard Mailing Rate. cost postage costs. Bulk Rate Mail can save a
lot of money on postage as . U.S. Domestic Postcard Rates. What Did it Cost to Mail a Postcard in the Past?
Postal cards were introduced in 1873 and could be mailed at a 1 cent rate (less .