4-up Postcards, 10.5 Mil Inkjet Gloss - 25 Sheets / 100 Postcards 4-up Postcards, 10.5 Mil Inkjet Gloss - 25 Sheets / 100 Postcards Made From 10.5 Mil Inkjet Gloss (230 gsm) 4 Postcards per Sheet - 4 1/4" x 5 1/2" each 8 1/2" x 11" Micrperforated