{"product_id":"capacity-book-mailers","title":"Capacity Book Mailers","description":"\u003cp\u003eOur \u003cspan class=\"bold\"\u003ecapacity book mailers\u003c\/span\u003e are gusseted to provide the flexibility of a small postal box once loaded, making them ideal for shipping flat and delicate items securely. These envelope-style mailers are rigid, puncture-resistant, and designed to protect goods such as \u003cspan class=\"bold\"\u003ebooks, magazines, diaries, hardbacks, DVDs, CDs, Blu-rays, gaming discs\u003c\/span\u003e and other similar products.\u003c\/p\u003e\n\u003cp\u003eEach mailer features a \u003cspan class=\"bold\"\u003esuper-strong peel \u0026amp; seal adhesive strip\u003c\/span\u003e for quick, tape-free closure, plus a \u003cspan class=\"bold\"\u003ecustomer-friendly ripper strip\u003c\/span\u003e for a clean and easy opening experience. Supplied flat-packed, these mailers save space in storage and are a dependable choice for e-commerce fulfilment.\u003c\/p\u003e\n\u003cp\u003eWe offer two strength options across this range:\u003c\/p\u003e\n\u003cul class=\"productbullets\"\u003e\n\u003cli\u003e\n\u003cspan class=\"bold\"\u003ePremium Corrugated (micro F flute):\u003c\/span\u003e medium to heavy duty protection with added rigidity\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"bold\"\u003eStandard Solid Board (400gsm):\u003c\/span\u003e light to medium duty protection with a slim, sturdy profile\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2 class=\"producth2\"\u003ePricing in Proportion (PiP) Sizes\u003c\/h2\u003e\n\u003cp\u003eAll of our capacity book mailers can be identified using Royal Mail’s Pricing in Proportion (PiP) index. Depending on the size and how much the gusset is expanded, these mailers fall into either the \u003cspan class=\"bold\"\u003eLarge Letter\u003c\/span\u003e or \u003cspan class=\"bold\"\u003eSmall Parcel\u003c\/span\u003e categories.\u003c\/p\u003e\n\u003ch2 class=\"producth2\"\u003eKey Benefits\u003c\/h2\u003e\n\u003cul class=\"productbullets\"\u003e\n\u003cli\u003e\n\u003cspan class=\"bold\"\u003eGusseted design:\u003c\/span\u003e expands up to 40mm to act like a small postal box\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"bold\"\u003eFast packing:\u003c\/span\u003e peel \u0026amp; seal strip for secure closure with no tape required\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"bold\"\u003eEasy opening:\u003c\/span\u003e built-in ripper strip for a neat customer unboxing\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"bold\"\u003eRecycled \u0026amp; recyclable:\u003c\/span\u003e responsibly sourced board options\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"bold\"\u003eIdeal for flat items:\u003c\/span\u003e protects against bends, knocks, and punctures\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2 class=\"producth2\"\u003ePremium Corrugated Capacity Book Mailers – Size Guide\u003c\/h2\u003e\n\u003cul class=\"productbullets\"\u003e\n\u003cli\u003e\n\u003cspan class=\"bold\"\u003eSize 1 (W x L):\u003c\/span\u003e 180x235mm \/ 18x23.5cm\n\u003cul class=\"productbullets\"\u003e\n\u003cli\u003e\n\u003cspan class=\"bold\"\u003eLoad Dimensions (W x L x H):\u003c\/span\u003e 140x195x40mm \/ 14x19.5x4cm\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"bold\"\u003ePiP Size When Flat:\u003c\/span\u003e Large Letter\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"bold\"\u003ePiP Size When Expanded:\u003c\/span\u003e Small Parcel\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"bold\"\u003eFor size guidance only this would replace the Kite Packaging code:\u003c\/span\u003e CFM180235M\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"bold\"\u003eOur SKU:\u003c\/span\u003e BOOK180-PC, MCP-BOOK180-PC-PSUK \u0026amp; MCP-BOOK180-PC\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"bold\"\u003eSize 2 (W x L):\u003c\/span\u003e 194x292mm \/ 19.4x29.2cm\n\u003cul class=\"productbullets\"\u003e\n\u003cli\u003e\n\u003cspan class=\"bold\"\u003eLoad Dimensions (W x L x H):\u003c\/span\u003e 154x252x40mm \/ 15.4x25.2x4cm\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"bold\"\u003ePiP Size When Flat:\u003c\/span\u003e Large Letter\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"bold\"\u003ePiP Size When Expanded:\u003c\/span\u003e Small Parcel\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"bold\"\u003eFor size guidance only this would replace the Kite Packaging code:\u003c\/span\u003e CFM194292\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"bold\"\u003eOur SKU:\u003c\/span\u003e BOOK194-PC, MCP-BOOK194-PC-PSUK \u0026amp; MCP-BOOK194-PC\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"bold\"\u003eSize 3 (W x L):\u003c\/span\u003e 234x334mm \/ 23.4x33.4cm\n\u003cul class=\"productbullets\"\u003e\n\u003cli\u003e\n\u003cspan class=\"bold\"\u003eLoad Dimensions (W x L x H):\u003c\/span\u003e 194x294x40mm \/ 19.4x29.4x4cm\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"bold\"\u003ePiP Size When Flat:\u003c\/span\u003e Large Letter\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"bold\"\u003ePiP Size When Expanded:\u003c\/span\u003e Small Parcel\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"bold\"\u003eFor size guidance only this would replace the Kite Packaging code:\u003c\/span\u003e CFM234334M\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"bold\"\u003eOur SKU:\u003c\/span\u003e BOOK234-PC, MCP-BOOK234-PC-PSUK \u0026amp; MCP-BOOK234-PC\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"bold\"\u003eSize 4 (W x L):\u003c\/span\u003e 249x352mm \/ 24.9x35.2cm\n\u003cul class=\"productbullets\"\u003e\n\u003cli\u003e\n\u003cspan class=\"bold\"\u003eLoad Dimensions (W x L x H):\u003c\/span\u003e 209x312x40mm \/ 20.9x31.2x4cm\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"bold\"\u003ePiP Size When Flat:\u003c\/span\u003e Large Letter\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"bold\"\u003ePiP Size When Expanded:\u003c\/span\u003e Small Parcel\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"bold\"\u003eFor size guidance only this would replace the Kite Packaging code:\u003c\/span\u003e CFM248345M\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"bold\"\u003eOur SKU:\u003c\/span\u003e BOOK249-PC, MCP-BOOK249-PC-PSUK \u0026amp; MCP-BOOK249-PC\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"bold\"\u003eSize 5 (W x L):\u003c\/span\u003e 278x400mm \/ 27.8x40cm\n\u003cul class=\"productbullets\"\u003e\n\u003cli\u003e\n\u003cspan class=\"bold\"\u003eLoad Dimensions (W x L x H):\u003c\/span\u003e 238x360x40mm \/ 23.8x36x4cm\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"bold\"\u003ePiP Size When Flat:\u003c\/span\u003e Small Parcel\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"bold\"\u003ePiP Size When Expanded:\u003c\/span\u003e Small Parcel\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"bold\"\u003eFor size guidance only this would replace the Kite Packaging code:\u003c\/span\u003e CFM278400M\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"bold\"\u003eOur SKU:\u003c\/span\u003e BOOK278-PC, MCP-BOOK278-PC-PSUK \u0026amp; MCP-BOOK278-PC\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2 class=\"producth2\"\u003eStandard Solid Board Capacity Book Mailers – Size Guide\u003c\/h2\u003e\n\u003cul class=\"productbullets\"\u003e\n\u003cli\u003e\n\u003cspan class=\"bold\"\u003eSize 1 (W x L):\u003c\/span\u003e 180x235mm \/ 18x23.5cm\n\u003cul class=\"productbullets\"\u003e\n\u003cli\u003e\n\u003cspan class=\"bold\"\u003eLoad Dimensions (W x L x H):\u003c\/span\u003e 140x195x40mm \/ 14x19.5x4cm\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"bold\"\u003ePiP Size When Flat:\u003c\/span\u003e Large Letter\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"bold\"\u003ePiP Size When Expanded:\u003c\/span\u003e Small Parcel\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"bold\"\u003eFor size guidance only this would replace the Kite Packaging code:\u003c\/span\u003e CSB140X40X195\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"bold\"\u003eOur SKU:\u003c\/span\u003e CBM-2, MCP-CBM-2-PSUK \u0026amp; MCP-CBM-2\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"bold\"\u003eSize 2 (W x L):\u003c\/span\u003e 194x292mm \/ 19.4x29.2cm\n\u003cul class=\"productbullets\"\u003e\n\u003cli\u003e\n\u003cspan class=\"bold\"\u003eLoad Dimensions (W x L x H):\u003c\/span\u003e 154x252x40mm \/ 15.4x25.2x4cm\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"bold\"\u003ePiP Size When Flat:\u003c\/span\u003e Large Letter\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"bold\"\u003ePiP Size When Expanded:\u003c\/span\u003e Small Parcel\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"bold\"\u003eFor size guidance only this would replace the Kite Packaging code:\u003c\/span\u003e CSB154X40X252\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"bold\"\u003eOur SKU:\u003c\/span\u003e CBM-3, MCP-CBM-3-PSUK \u0026amp; MCP-CBM-3\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"bold\"\u003eSize 3 (W x L):\u003c\/span\u003e 234x334mm \/ 23.4x33.4cm\n\u003cul class=\"productbullets\"\u003e\n\u003cli\u003e\n\u003cspan class=\"bold\"\u003eLoad Dimensions (W x L x H):\u003c\/span\u003e 194x294x40mm \/ 19.4x29.4x4cm\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"bold\"\u003ePiP Size When Flat:\u003c\/span\u003e Large Letter\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"bold\"\u003ePiP Size When Expanded:\u003c\/span\u003e Small Parcel\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"bold\"\u003eFor size guidance only this would replace the Kite Packaging code:\u003c\/span\u003e CSB194X40X294\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"bold\"\u003eOur SKU:\u003c\/span\u003e CBM-4, MCP-CBM-4-PSUK \u0026amp; MCP-CBM-4\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"bold\"\u003eSize 4 (W x L):\u003c\/span\u003e 249x352mm \/ 24.9x35.2cm\n\u003cul class=\"productbullets\"\u003e\n\u003cli\u003e\n\u003cspan class=\"bold\"\u003eLoad Dimensions (W x L x H):\u003c\/span\u003e 209x312x40mm \/ 20.9x31.2x4cm\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"bold\"\u003ePiP Size When Flat:\u003c\/span\u003e Large Letter\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"bold\"\u003ePiP Size When Fully Expanded:\u003c\/span\u003e Small Parcel\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"bold\"\u003eFor size guidance only this would replace the Kite Packaging code:\u003c\/span\u003e CSB209X40X312\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"bold\"\u003eOur SKU:\u003c\/span\u003e SB-CE249, MCP-SB-CE249-PSUK \u0026amp; MCP-SB-CE249\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"bold\"\u003eSize 5 (W x L):\u003c\/span\u003e 278x400mm \/ 27.8x40cm\n\u003cul class=\"productbullets\"\u003e\n\u003cli\u003e\n\u003cspan class=\"bold\"\u003eLoad Dimensions (W x L x H):\u003c\/span\u003e 238x360x40mm \/ 23.8x36x4cm\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"bold\"\u003ePiP Size When Flat:\u003c\/span\u003e Small Parcel\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"bold\"\u003ePiP Size When Expanded:\u003c\/span\u003e Small Parcel\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"bold\"\u003eFor size guidance only this would replace the Kite Packaging code:\u003c\/span\u003e CSB238X40X360\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"bold\"\u003eOur SKU:\u003c\/span\u003e CBM-5, MCP-CBM-5-PSUK \u0026amp; MCP-CBM-5\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cspan class=\"bold\"\u003ePlease note:\u003c\/span\u003e Dimensions may vary slightly (±10–20mm) due to manufacturing tolerances. A sample service is available for testing prior to bulk orders. Branding\/barcodes may appear on parts of the capacity book mailer. Images are for reference purposes only and there may be slight variances to the product supplied.\u003c\/p\u003e","brand":"Parcelsend UK","offers":[{"title":"180mm x 235mm \/ Standard Solid Board","offer_id":56207326904695,"sku":"MCP-CBM-1-PSUK","price":0.33,"currency_code":"GBP","in_stock":true},{"title":"194mm x 292mm \/ Standard Solid Board","offer_id":56207326937463,"sku":"MCP-CBM-2-PSUK","price":0.39,"currency_code":"GBP","in_stock":true},{"title":"234mm x 334mm \/ Standard Solid Board","offer_id":56207326970231,"sku":"MCP-CBM-3-PSUK","price":0.48,"currency_code":"GBP","in_stock":true},{"title":"249mm x 352mm \/ Standard Solid Board","offer_id":56207327002999,"sku":"MCP-CBM-4-PSUK","price":0.55,"currency_code":"GBP","in_stock":true},{"title":"278mm x 400mm \/ Standard Solid Board","offer_id":56207327035767,"sku":"MCP-CBM-5-PSUK","price":0.46,"currency_code":"GBP","in_stock":true},{"title":"180mm x 235mm \/ Premium Corrugated","offer_id":56207327068535,"sku":"MCP-BOOK180-PC-PSUK","price":0.39,"currency_code":"GBP","in_stock":true},{"title":"194mm x 292mm \/ Premium Corrugated","offer_id":56207327101303,"sku":"MCP-BOOK194-PC-PSUK","price":0.45,"currency_code":"GBP","in_stock":true},{"title":"234mm x 334mm \/ Premium Corrugated","offer_id":56207327134071,"sku":"MCP-BOOK234-PC-PSUK","price":0.54,"currency_code":"GBP","in_stock":true},{"title":"249mm x 352mm \/ Premium Corrugated","offer_id":56207327166839,"sku":"MCP-BOOK249-PC-PSUK","price":0.78,"currency_code":"GBP","in_stock":true},{"title":"278mm x 400mm \/ Premium Corrugated","offer_id":56207327199607,"sku":"MCP-BOOK278-PC-PSUK","price":1.05,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0437\/0094\/5064\/files\/cardboard-envelope-mix.png?v=1764001034","url":"https:\/\/parcelsend.uk\/products\/capacity-book-mailers","provider":"Parcelsend UK","version":"1.0","type":"link"}