. … Clear Self-Sealing Poly Bag Product Specifications: Dimensions: 19″ x 24″ Thickness: 1.5 mil Quantity: 20 Pieces Additional Details: Polyethylene mailer is water, tear, and puncture resistant for maximum protection Self-sealing, peel and stick, adhesive keeps contents secure and tamper proof Surface easily accepts ink, stamps, and labels High strength seams for maximum protection Suffocation Warning: Printed on the side without the 2″ flap. «Warning: To avoid danger of suffocation, keep this bag away from babies and children. Do not use in cribs, beds, carriages and play pens. This is not a toy. Knot before throwing away.»