SECURE CLOSURE: Self-sealing closure with a strong adhesive strip that folds over to close plastic envelopes securely DURABLE PROTECTION: Tamper-resistant and durable with an opaque plastic construction to protect privacy; waterproof and dirt-resistant VERSATILE USE: Mailing bags ideal for shipping lightweight products and soft items such as clothing DIMENSIONS: 10 x 13 inches each BULK VALUE: 100-pack of poly mailer shipping bags for sending goods via post or courier; black