This pack of 500 Duck Security Packing List Envelopes is perfect for all your packing and shipping needs. Measuring 5 inches by 4 inches, these envelopes provide ample space for important shipping information. Made in the United States, they are of high quality and provide excellent security for your documents. With a brand name like Duck, you can trust that these envelopes will keep your sensitive information safe. Whether you’re sending confidential documents or valuable items, these envelopes are the perfect solution. Don’t let the hassle of shipping and packing get in the way of your business – use Duck Security Packing List Envelopes for an easy and safe shipping experience.