heavyweight blank postcard paper for printing - white - 250 sheets / 1000 postcards - perforated 4 per sheet - thick 80lb cover cardstock - inkjet/laser printable desktop publishing supplies, inc. desktop publishing suppliestm brand 80lb white 4up postcards are perfect for creating your very own postcards right from your home or office printer! these 4up white postcards are made from a heavyweight 80lb cover white cardstock and work with inkjet or laser printers. each postcard sheet measures 8 1/2" x 11" and is microperforated to break down to 4 individual postcards measures 4 1/4" x 5 1/2" each. our micro-perforation technology utilizes 72 perforations per inch resulting in a cleaner edge than a standard perforation and still makes it easy to break the cards apart from each other. <br/><br/> our heavyweight 4up postcards are designed to be compatible with most software. we utilize the standard 4up postcards template which can be found in many programs including microsoft word, print shop, print master, etc.