This should ONLY be ordered with an order for upgraded Euro flap envelopes. Add-on for fully assembled Euro flap envelope liners for A6 (4.5" × 6.25") stationery and 5" × 7" cards—printed on 80 lb eggshell paper and installed in your envelopes for you! Adds 1 additional business day to production; quantity must match your stationery order.