Inside (Usable size)  4"x6"+1.57" Flap

【Cushioning Mailers】:Our bubble poly mailers are lined with 80gsm bubble with unique air cellular layers and all-round strong, Foam mailboxes with integral air bubbles provide cushioning agains.
【Waterproof & Self Sealing】:The mailing envelopes have real water resistance with strong self-adhesive, please don't worry! if your package meets rainy day ,And protect your customer's packages from rain or damage.
【Sturdy & Durable】:Shipping envelopes are crafted with finest polyethylene materials. These shipping bags are tear-resistant, puncture-proof, which exceptionally protect your packages. Reassured mail products, supplies, gifts and more from your online shop or home based business.
【Convenient & Easy to Use】:These poly shipping bags are the perfect choice for small and middle business for easily using with not require extra packaging material, which can improve your company productivity at work, save much time and mailing cost.
【Multipurpose Mailing Envelopes】:Perfect for sending small items like jewelry, business cards, cosmetics, pins, DVDs, medical, accessories, holiday gifts and more.