PREMIUM MATERIAL: Made from sturdy 24 lb. white wove paper, providing durability and professional appearance for your mailing needs PERFECT SIZE: 6" x 9" dimensions make these booklet envelopes ideal for catalogs, brochures, photographs, and invitations without folding SECURE CLOSURE: Features a strong gummed flap that creates a reliable seal when moistened for document protection during mailing and storage CONVENIENT DESIGN: Open-side construction allows for easy insertion of materials while maintaining document security BULK QUANTITY: Package includes 500 white booklet envelopes, perfect for high-volume business, office, or personal mailing needs