If you enter a lot of mail-in sweepstakes you will most likely need to have 3-1/2″ x 5″ cards on hand. We use 110 lb. cardstock to make our 3-1/2″ x 5″ cards. They are not thick enough to be used as a postcard. You will want to place them inside of an envelope.
Sold in packs of 100.
