{"product_id":"premium-grey-poly-mailing-bags-strong-waterproof-lightweight","title":"Premium Grey Poly Mailing Bags | Strong, Waterproof \u0026 Lightweight","description":"\u003cp dir=\"ltr\"\u003e\u003cspan\u003eBuilt from high-grade polyethene, our grey poly mailers offer superior strength, waterproof protection and a clean professional finish, at a fraction of the cost of cardboard boxes. Lightweight enough to keep postage costs down. Tough enough to survive the courier network.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cstrong\u003eKey Features\u003c\/strong\u003e\u003c\/p\u003e\n\u003col\u003e\n\u003cli role=\"presentation\" dir=\"ltr\"\u003e\u003cspan\u003ePermanent self-seal adhesive- no tape needed\u003c\/span\u003e\u003c\/li\u003e\n\u003cli role=\"presentation\" dir=\"ltr\"\u003e\u003cspan\u003e100% waterproof outer layer\u003c\/span\u003e\u003c\/li\u003e\n\u003cli role=\"presentation\" dir=\"ltr\"\u003e\u003cspan\u003eTear-resistant high-grade polyethene\u003c\/span\u003e\u003c\/li\u003e\n\u003cli role=\"presentation\" dir=\"ltr\"\u003e\u003cspan\u003eOpaque grey finish for complete privacy\u003c\/span\u003e\u003c\/li\u003e\n\u003cli role=\"presentation\" dir=\"ltr\"\u003e\u003cspan\u003e Lightweight- reduces postage costs\u003c\/span\u003e\u003c\/li\u003e\n\u003cli role=\"presentation\" dir=\"ltr\"\u003e\u003cspan\u003eBPA-free material\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003cp dir=\"ltr\"\u003e\u003cstrong\u003eAvailable Sizes\u003c\/strong\u003e\u003c\/p\u003e\n\u003cdiv align=\"left\" dir=\"ltr\"\u003e\n\u003ctable height=\"209\" style=\"width: 89.2107%;\"\u003e\n\u003ccolgroup\u003e \u003ccol width=\"54\" style=\"width: 15.809%;\"\u003e \u003ccol width=\"284\" style=\"width: 83.9457%;\"\u003e \u003c\/colgroup\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth scope=\"col\"\u003e\n\u003cp dir=\"ltr\"\u003e\u003cstrong\u003eSize\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/th\u003e\n\u003cth scope=\"col\"\u003e\n\u003cp dir=\"ltr\"\u003e\u003cstrong\u003eBest For\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003e6.5 x 9\"\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eAccessories, cosmetics, jewellery\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003e9 x 12\"\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eT-shirts, books, documents\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003e10 x 14\"\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eHoodies, A4 documents\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003e12 x 16\"\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eLarger garments, homeware, multi-item orders\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cp\u003e\u003cbr\u003e\u003cmeta charset=\"utf-8\"\u003e\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cstrong\u003ePerfect For Shipping\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eClothing · Books · Cosmetics · Gifts · Accessories · Homeware\u003c\/span\u003e\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cstrong\u003eCompatible With\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eRoyal Mail · DPD · Evri · Yodel · DHL · Royal Mail Click \u0026amp; Drop · eBay · Etsy · Amazon · Shopify · Vinted · Depop\u003c\/span\u003e\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cstrong\u003eSpecifications\u003c\/strong\u003e\u003c\/p\u003e\n\u003col\u003e\n\u003cli role=\"presentation\" dir=\"ltr\"\u003e\n\u003cspan\u003eMaterial:\u003c\/span\u003e\u003cspan\u003e High-density polyethene (HDPE)\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli role=\"presentation\" dir=\"ltr\"\u003e\n\u003cspan\u003eColour:\u003c\/span\u003e\u003cspan\u003e Opaque matte grey\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli role=\"presentation\" dir=\"ltr\"\u003e\n\u003cspan\u003eClosure:\u003c\/span\u003e\u003cspan\u003e Permanent peel-and-seal adhesive strip\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli role=\"presentation\" dir=\"ltr\"\u003e\n\u003cspan\u003eWaterproof:\u003c\/span\u003e\u003cspan\u003e Yes\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli role=\"presentation\" dir=\"ltr\"\u003e\n\u003cspan\u003eTear resistant:\u003c\/span\u003e\u003cspan\u003e Yes\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli role=\"presentation\" dir=\"ltr\"\u003e\n\u003cspan\u003eAvailable:\u003c\/span\u003e\u003cspan\u003e Individual packs \u0026amp; bulk quantities\u003c\/span\u003e\u003cspan\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003cp dir=\"ltr\"\u003e\u003cstrong\u003eFAQs\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cstrong\u003eAre these waterproof?\u003c\/strong\u003e\u003cspan\u003e \u003cbr\u003eYes — fully waterproof from dispatch to doorstep.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cstrong\u003eCan they fit through a letterbox?\u003c\/strong\u003e\u003cspan\u003e \u003cbr\u003eThe 6.5x9\" and 9x12\" sizes can, depending on the contents' thickness. Always verify against Royal Mail's large letter dimensions.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cstrong\u003eCan I buy in bulk?\u003c\/strong\u003e\u003cspan\u003e \u003cbr\u003eYes — bulk pricing available. Contact us for trade orders. \u003c\/span\u003e\u003cspan\u003eSame-day dispatch on orders placed before 2 pm weekdays.\u003c\/span\u003e\u003c\/p\u003e","brand":"Dispatch Supply","offers":[{"title":"6.5 x 9\"","offer_id":64986311557469,"sku":null,"price":0.0,"currency_code":"GBP","in_stock":true},{"title":"9 x 12\"","offer_id":64986311590237,"sku":null,"price":0.0,"currency_code":"GBP","in_stock":true},{"title":"10 x 14\"","offer_id":64986311623005,"sku":null,"price":0.0,"currency_code":"GBP","in_stock":true},{"title":"12 x 16\"","offer_id":64986311655773,"sku":null,"price":0.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1075\/5712\/6493\/files\/ChatGPTImageJun15_2026_10_49_04AM.png?v=1781578703","url":"https:\/\/dispatchsupply.co.uk\/products\/premium-grey-poly-mailing-bags-strong-waterproof-lightweight","provider":"Dispatch Supply","version":"1.0","type":"link"}