Our Crystal Clear Flap Seal Bags offer a professional display for cards and envelopes in the retail setting. The B6X6 bag measures 6 7/16" x 6 1/4" and is ideal for a 6 1/4" square card or envelope, or for a 6" x 6" product, art, photo, backing or mat up to just over 1/4" thick. The adhesive is on the bag flap, allowing you to customize the height for smaller dimensions. Archival safe.