Create your own high-impact designs on this premium-quality card stock. Micro-perforated for easy separation and guaranteed perfect edges every time. Cards won't jam. For use on your laser and inkjet printers. Compatible with most label printing software programs. Acid-free and lignin-free. Post Cards. Ruling: Unruled; Card Size (H x W): 4 x 6; Color(s): White; Color Family: White.