DIMENSIONS: Standard 6" x 9" catalog envelopes perfect for mailing documents, brochures, and flyers with convenient open-end design MATERIAL: Made from durable 24lb kraft paper that provides excellent protection for your important mailings CLOSURE TYPE: Features secure gummed flap closure ensuring contents remain safely sealed during transit QUANTITY: Bulk pack of 500 envelopes ideal for high-volume mailing needs in offices, schools, and businesses VERSATILITY: Perfect for organizing and mailing catalogs, brochures, invoices, promotional materials, and important documents