Age Faded mail invoices safely with these Staples standard invoice double-window gummed envelopes. Each envelope is made with 24-pound white paper, offering protection against wear and tear and weather, while the gummed top closure on the commercial flap ensures envelope contents stay secure. These Staples standard invoice double-window gummed envelopes come in a pack of 100 for bulk mailing and are tinted, protecting any confidential customer information.Age Faded.US #9 business envelopes are suitable for many mailing projectsMade from white 24 lb. paper for durabilityThese envelopes measure 3 7/8″H x 8 7/8″L in size, providing enough space for your mailGummed closure with commercial flap keeps contents in placeSecurity-tinted pattern helps to discourage reading sensitive information through the outside of the envelopeThe flap is on the long side for easier fillingTear-resistant envelope provides extra security for item being shippedDouble-window envelopes conveniently display addressesWindow Dimensions: Top window 3.5″ x 1.19″; Bottom window 4″ x 1.19″