500 no. 9 double window security envelopes- self seal with peel and seal flap- designed for quickbooks invoices and business statements - 3 7/8'' x 8 7/8'' kiarmesh supplies <p><b>100% money back guarantee</b></p><p>we stand behind our products completely. we understand that sometimes buying physical products can be difficult if you cannot physically see what you are buying, however, if our product is not exactly what you are looking for, or does not meet your expectation then send them back anytime for a 100 % refund.</p>