Product Specifications: —Dimensions: 12.5″ x 19″ —Usable Space: 12.5″ x 18″ —Lined with bubbles for protection. —Brand: ProLine Additional Details: —Self-sealing, peel-and-stick adhesive keeps contents secure and tamper-proof —Extremely durable and lightweight Poly material helps save on postage —Strong seams, fins on two sides, and seamless bottom for maximum protection —Surface easily accepts ink, stamps, and labels —Approved for USPS, FedEx, UPS, and DHL.