Perfect for custom thank you cards, promotional advertising, product instructions, and other postcards for mailingHeavyweight 80 lbs / 216 gsm white cardstock provides an ideal base for sharp text and vivid imagesSheets are micro-perforated for easy separation and smooth, clean edgesPrint stunning, double-sided designs on printable cardstock paper optimized for laser printersUse Avery Design & Print Online to easily create custom postcards with your own design or with our free Avery card templatesMeets U.S. postal regulations for postcards – just design, print, and apply the required postage; no envelopes required!Includes 50 printable sheets for a total of 200 4-1/4" x 5-1/2" postcards