DIMENSIONS: Large 9" x 12" booklet envelopes designed to hold documents without folding, perfect for mailing catalogs, presentations, and photographs MATERIAL QUALITY: Constructed from heavy 28 lb. white wove paper for superior durability and a professional appearance SECURE CLOSURE: Features a strong gummed flap that creates a reliable seal when moistened to protect contents during transit DESIGN: Open-side configuration allows easy insertion of materials while maintaining document security QUANTITY & ORIGIN: Bulk pack of 150 envelopes manufactured in USA for consistent quality and reliable performance