This box contains about 200 Domtar Lynx Opaque White A-2 Envelopes measuring 5-3/4″ x 4-3/8″. These envelopes are perfect for all your mailing needs and are made from high-quality materials to ensure durability and reliability. You can trust that your documents will be safe and secure during transit. These envelopes are suitable for a variety of uses, including personal, professional, and business.