The Tyvek Envelopes by Papercone are self-stick envelopes measuring 11-1/2 X 14-1/2 inches. This pack of 50 envelopes is made in the United States and offers free shipping, making it a convenient and cost-effective option for your shipping needs. The white flat design of the envelopes provides a professional look for your mailings, while the self-stick feature ensures easy sealing without the need for additional adhesive. Ideal for businesses and industrial use, these Tyvek Envelopes offer reliable and efficient mailing solutions.