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 Are there any limitations on where I can place content? How long until my mail is delivered? What product specs for letter envelopes do you have available? What product specs for letters do you have available? What is the difference between my test and live API Key?