9″x12″ catalog envelopes made from durable 28 lb kraft paper Brown kraft material helps conceal contents for added privacy Designed with a self-seal adhesive strip that runs across the envelope for a secure closure Suitable for mailing large documents, catalogs, magazines, brochures, direct mail, promotional materials, and general business correspondence Can be hand addressed or customized with business information Built to resist normal handling during mailing and help reduce tampering Includes 100 envelopes per box