Inside Dimensions: 8.5 in x 11.25 in (215 mm x 285 mm). Super strong & moisture resistant. www.scotchbrand.com. Questions or comments? Call toll-free 1-800-328-6276. Self-sealing closure. This product may not be recyclable in your area. This product is made of the same material as plastic shopping bags. Some retail stores and recyclers have a plastic bag recycling program and may accept this mailer in their program. Made in USA for 3M with globally sourced materials.