100 Pieces 5”x7” Self-seal Poly Mailers. Tear-proof, Water-resistant and Postage-saving Lightweight Plastic Shipping Envelopes / Bags Perfect Size – 5’x7′ when sealed, 100 pieces of mailer bagsExtra Thick – 2.5 mil thickness provide superior sealing and protection for shippingSuper Security – Water, dirty, tear and puncture resistant, completely non-transparent for privacyVery Durable – Pressure sensitive adhesive provides a high strength durable self sealing