The Staples Clasp Gummed Envelope is a high-quality product designed for professional use. With dimensions of 12″ x 15.5″ and a weight capacity of 28lb, this envelope is perfect for securely shipping and mailing documents and packages. The Staples ST472902 model from Staples is known for its reliability and durability, making it a great choice for businesses and individuals looking to send important items with confidence. The box contains 50+ envelopes.