What product specs for postcards do you have available? 4” x 6” Postcard 120# (14PT) gloss cover, UV coated Full Bleed 6” x 9” Postcard 120# (14PT) gloss cover, UV coated Full Bleed 6” x 11” Postcard 120# (14PT) gloss cover, UV coated Full Bleed Related articles What is the difference between my test and live API Key? What product specs for letters do you have available? Is your US Address Verification API CASS Certified? What does the address_placement parameter mean? How long until my mail is delivered?