UNIQUEPACKING 100 Pcs 6 11/16 X 6 9/16 Clear Resealable Cello/Cellophane Bags Good for 6.5x6.5 Square Card Crystal clear and resealable self adhesive sealing strip that protects the contents from dust, bugs, moisture, and mildew. 1.2 mil (30 micron) thickness top quality. Sold in a pack of 100. Acid free, FDA and USDA compliant. Bag dimension: 6 11/16 X 6 9/16 inches (not include flap) This bag will hold a 6.5x6.5 inches square card only, can't fit an envelope.