6x9 Envelopes White 500 Box Open End Catalog Envelope -Bulk Box 6" x 9" These 6-inch by 9-inch catalog envelopes are ideal for a variety of lightweight mail. 6 By 9 Size Perfect for your lightweight mailing needs, including newsletters, receipts, marketing materials, meeting minutes and informal letters to friends and family. Gummed flap closure on top flap and side openings for long-lasting security Open end closure for easier insertion and retrieval of contents. Letter Size Pricing  Ideal 6 x 9 Size Offers Maximum Space Within USPS 1-Stamp Dimension Requirements; Buy Bulk & Save Big on Both Supplies & Shipping