20PCS/lot Black Foam Envelope Bags Self Seal Mailers Padded Shipping Envelopes With Bubble Mailing Bag Shipping Packages Bag

20 PCS/Lot Black Foam Envelope Bags Self Seal Mailers Padded Shipping Envelopes With Bubble Mailing Bag Shipping Packages BagProduct selling points:1.These mailers add a po p of color to the mail and stands out from the rest, quite different from the standard one. Your customers will look forward to that charming chromatic envelope in the mail. Those padded mailers are lightweight mailing envelops, will not add to your shipping costs.2.Tear Resistance Envelopes: This padded envelopes are with durable and sturdy surface, work great instead of paper versions that tear with sharp,heavy, or weird shaped products. Also made with multilayered polyethylene sheets, provide an excellent protection for shipment.3.Multipurpose Bubble Mailers: You can use these to mail cosmetics, paintings, fashion accessories, jewelry, medicines, seeds and bulbs, and a lot more. They are padded enough to protect fragile things during shipping. The laminated top allows you to attach self-adhesive stamps and address labels easily.4.Self-Adhering Envelopes: The poly bubble mailers come with a self-adhesive tamperproof seal. Once the envelope has been sealed, it cannot be opened without visible signs of tampering. The smooth surface of the mailers makes it easy to stick stamps and address labels.Specification:Color: blackSize: (11x15) (13x15)(13x18) (15x18)(15x20) (18x23) (25x30) cm, Pack of 20.Material: New material PE + Pearl filmThere are 2 sides borders (0.39''/10mm each)Example:Like the size 11x15cm, this is the external sizeSo the inner size of this size should be: 9x15cm (3.54x5.91in)Flap: 4cm (1.75 inches)     How to choose the bag size: The bag size is calculated in terms of product volume.Bag width: width + height + 3cm (edge and margin)Bag depth: length + height + 2cm (balance)Calculation trilogy1 ordinary notebook high 2cm wide 14cm long 20cm2 required bag sizeBag width = (14 + 2 + 3) = 19Bag length = (20 + 2 + 2) = 243 choose the closest size20x25+4cm (+4cm is the seal)