PJ1 Opaque Poly Mailers measure 165mm x 240mm and are ideal for sending smaller items that can be folded flat to approximately A5 size such as scarves, gloves or lightweight t-shirts. Weighing just 5g these are our smallest poly mailers providing great protection without adding to postal charges. We use premium quality white opaque 75 micron polythene with heat sealed edges and a high tack self-adhesive closure that creates a secure, tamper-proof package. Durable and robust, these mail bags keep their contents safe from water damage and are resistant to puncturing or tearing in the post. An easy-open strip gives the customer fast access to their purchases.