65lb white jumbo postcards - 2 per page - breaks to 5 1/2" x 8 1/2" sheets (25 sheets / 50 postcards) desktop publishing supplies, inc. our jumbo postcards come on 8 1/2" x 11" page 2-up. each large post card measures 5 1/2" 8 1/2". these cards are inkjet and laser compatible and are perforated for easy breaking. made from 65lb cover.