{"product_id":"letterbox-postal-boxes-premium-size-1-8","title":"Letterbox Postal Boxes (Premium) – Size 1–8","description":"\u003ch2\u003e\u003cstrong\u003eLarge Letter Boxes\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003eLightweight letterbox postal boxes designed to meet Royal Mail Large Letter size rules.\u003cspan\u003e Perfect for small eCommerce items, documents and gifts, these boxes help you keep postage costs low while ensuring a smooth delivery experience. These letterbox postal boxes are ideal for small eCommerce orders and low‑cost Royal Mail shipping.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eMade from \u003cstrong\u003ehigh‑quality corrugated cardboard\u003c\/strong\u003e, they provide a snug, protective fit that reduces movement and helps prevent damage — especially when paired with bubble wrap. Their \u003cstrong\u003eplastic‑free\u003c\/strong\u003e, \u003cstrong\u003e100% recyclable\u003c\/strong\u003e and \u003cstrong\u003ebiodegradable\u003c\/strong\u003e design makes them an eco‑friendly choice for modern businesses.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eBranding is printed discreetly on the inside, remaining hidden once constructed. Some products in this range follow the same box style but fall under \u003cstrong\u003eSmall Parcel\u003c\/strong\u003e sizing — please check dimensions before packing. Avoid overfilling to stay within Royal Mail’s Large Letter restrictions.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eNext‑day shipping options available to keep your orders moving quickly.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e📦 Size Guide\u003c\/h3\u003e\n\u003cp\u003eAll measurements shown are internal dimensions. Choose your required size from the options above.\u003c\/p\u003e\n\u003ctable style=\"width: 100.087%; height: 264.282px;\"\u003e\n\u003cthead\u003e\n\u003ctr style=\"height: 58.7812px;\"\u003e\n\u003cth style=\"width: 25.2189%; height: 58.7812px;\"\u003eSize\u003c\/th\u003e\n\u003cth style=\"width: 26.9702%; height: 58.7812px;\"\u003eInternal Measurements (mm)\u003c\/th\u003e\n\u003cth style=\"width: 23.2925%; height: 58.7812px;\"\u003eInternal Measurements (inches)\u003c\/th\u003e\n\u003cth style=\"width: 23.2925%; height: 58.7812px;\"\u003e\n\u003cmeta charset=\"utf-8\"\u003eMinimum Order\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr style=\"height: 27.7188px;\"\u003e\n\u003ctd style=\"width: 25.2189%; height: 27.7188px;\"\u003eSize 1\u003c\/td\u003e\n\u003ctd style=\"width: 26.9702%; height: 27.7188px;\"\u003e\n\u003cmeta charset=\"utf-8\"\u003e101 × 101 \u003cmeta charset=\"utf-8\"\u003e× 19\u003c\/td\u003e\n\u003ctd style=\"width: 23.2925%; height: 27.7188px;\"\u003e4 × 4 \u003cmeta charset=\"utf-8\"\u003e× 0.75\u003c\/td\u003e\n\u003ctd style=\"width: 23.2925%; height: 27.7188px;\"\u003e10\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 27.7188px;\"\u003e\n\u003ctd style=\"width: 25.2189%; height: 27.7188px;\"\u003eSize 2\u003c\/td\u003e\n\u003ctd style=\"width: 26.9702%; height: 27.7188px;\"\u003e\n\u003cmeta charset=\"utf-8\"\u003e \u003cmeta charset=\"utf-8\"\u003e160 × 110 \u003cmeta charset=\"utf-8\"\u003e× 19\u003cbr\u003e\n\u003c\/td\u003e\n\u003ctd style=\"width: 23.2925%; height: 27.7188px;\"\u003e\n\u003cmeta charset=\"utf-8\"\u003e6.25 × 4.25 \u003cmeta charset=\"utf-8\"\u003e× 0.75\u003c\/td\u003e\n\u003ctd style=\"width: 23.2925%; height: 27.7188px;\"\u003e10\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 27.7188px;\"\u003e\n\u003ctd style=\"width: 25.2189%; height: 27.7188px;\"\u003eSize 3\u003c\/td\u003e\n\u003ctd style=\"width: 26.9702%; height: 27.7188px;\"\u003e\n\u003cmeta charset=\"utf-8\"\u003e \u003cmeta charset=\"utf-8\"\u003e \u003cmeta charset=\"utf-8\"\u003e217 × 108 \u003cmeta charset=\"utf-8\"\u003e× 19\u003cbr\u003e\n\u003c\/td\u003e\n\u003ctd style=\"width: 23.2925%; height: 27.7188px;\"\u003e\n\u003cmeta charset=\"utf-8\"\u003e \u003cmeta charset=\"utf-8\"\u003e8.5 × 4.25 \u003cmeta charset=\"utf-8\"\u003e× 0.75\u003cbr\u003e\n\u003c\/td\u003e\n\u003ctd style=\"width: 23.2925%; height: 27.7188px;\"\u003e10\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 27.7188px;\"\u003e\n\u003ctd style=\"width: 25.2189%; height: 27.7188px;\"\u003eSize 4\u003c\/td\u003e\n\u003ctd style=\"width: 26.9702%; height: 27.7188px;\"\u003e\n\u003cmeta charset=\"utf-8\"\u003e \u003cmeta charset=\"utf-8\"\u003e \u003cmeta charset=\"utf-8\"\u003e \u003cmeta charset=\"utf-8\"\u003e \u003cmeta charset=\"utf-8\"\u003e225 × 160 \u003cmeta charset=\"utf-8\"\u003e× 19\u003cbr\u003e\n\u003c\/td\u003e\n\u003ctd style=\"width: 23.2925%; height: 27.7188px;\"\u003e\n\u003cmeta charset=\"utf-8\"\u003e \u003cmeta charset=\"utf-8\"\u003e8.75 × 6.25 \u003cmeta charset=\"utf-8\"\u003e× 0.75\u003c\/td\u003e\n\u003ctd style=\"width: 23.2925%; height: 27.7188px;\"\u003e10\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 27.7188px;\"\u003e\n\u003ctd style=\"width: 25.2189%; height: 27.7188px;\"\u003e\n\u003cmeta charset=\"utf-8\"\u003eSize 5\u003c\/td\u003e\n\u003ctd style=\"width: 26.9702%; height: 27.7188px;\"\u003e\n\u003cmeta charset=\"utf-8\"\u003e \u003cmeta charset=\"utf-8\"\u003e \u003cmeta charset=\"utf-8\"\u003e \u003cmeta charset=\"utf-8\"\u003e320 × 230 \u003cmeta charset=\"utf-8\"\u003e× 19\u003cbr\u003e\n\u003c\/td\u003e\n\u003ctd style=\"width: 23.2925%; height: 27.7188px;\"\u003e\n\u003cmeta charset=\"utf-8\"\u003e \u003cmeta charset=\"utf-8\"\u003e \u003cmeta charset=\"utf-8\"\u003e12.5 × 9 \u003cmeta charset=\"utf-8\"\u003e× 0.75\u003cbr\u003e\n\u003c\/td\u003e\n\u003ctd style=\"width: 23.2925%; height: 27.7188px;\"\u003e5\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 27.7188px;\"\u003e\n\u003ctd style=\"width: 25.2189%; height: 27.7188px;\"\u003e\n\u003cmeta charset=\"utf-8\"\u003eSize 6\u003c\/td\u003e\n\u003ctd style=\"width: 26.9702%; height: 27.7188px;\"\u003e\n\u003cmeta charset=\"utf-8\"\u003e \u003cmeta charset=\"utf-8\"\u003e \u003cmeta charset=\"utf-8\"\u003e \u003cmeta charset=\"utf-8\"\u003e101 × 101 \u003cmeta charset=\"utf-8\"\u003e× 50\u003cbr\u003e\n\u003c\/td\u003e\n\u003ctd style=\"width: 23.2925%; height: 27.7188px;\"\u003e\n\u003cmeta charset=\"utf-8\"\u003e4 × 4 \u003cmeta charset=\"utf-8\"\u003e× 2\u003cbr\u003e\n\u003c\/td\u003e\n\u003ctd style=\"width: 23.2925%; height: 27.7188px;\"\u003e10\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 25.2189%; height: 19.5938px;\"\u003eSize 7\u003c\/td\u003e\n\u003ctd style=\"width: 26.9702%; height: 19.5938px;\"\u003e\n\u003cmeta charset=\"utf-8\"\u003e \u003cmeta charset=\"utf-8\"\u003e \u003cmeta charset=\"utf-8\"\u003e \u003cmeta charset=\"utf-8\"\u003e160 × 110 \u003cmeta charset=\"utf-8\"\u003e× 50\u003cbr\u003e\n\u003c\/td\u003e\n\u003ctd style=\"width: 23.2925%; height: 19.5938px;\"\u003e\n\u003cmeta charset=\"utf-8\"\u003e \u003cmeta charset=\"utf-8\"\u003e \u003cmeta charset=\"utf-8\"\u003e6.25 × 4.25 \u003cmeta charset=\"utf-8\"\u003e× 2\u003cbr\u003e\n\u003c\/td\u003e\n\u003ctd style=\"width: 23.2925%; height: 19.5938px;\"\u003e10\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 25.2189%; height: 19.5938px;\"\u003eSize 8\u003c\/td\u003e\n\u003ctd style=\"width: 26.9702%; height: 19.5938px;\"\u003e\n\u003cmeta charset=\"utf-8\"\u003e \u003cmeta charset=\"utf-8\"\u003e \u003cmeta charset=\"utf-8\"\u003e \u003cmeta charset=\"utf-8\"\u003e217 × 108 \u003cmeta charset=\"utf-8\"\u003e× 50\u003cbr\u003e\n\u003c\/td\u003e\n\u003ctd style=\"width: 23.2925%; height: 19.5938px;\"\u003e\n\u003cmeta charset=\"utf-8\"\u003e \u003cmeta charset=\"utf-8\"\u003e \u003cmeta charset=\"utf-8\"\u003e8.5 × 4.25 \u003cmeta charset=\"utf-8\"\u003e× 2\u003cbr\u003e\n\u003c\/td\u003e\n\u003ctd style=\"width: 23.2925%; height: 19.5938px;\"\u003e10\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e\u003cbr\u003e\u003cbr\u003e\u003c\/p\u003e","brand":"Salisbury Pack \u0026 Post","offers":[{"title":"Size 1 \/ PiP: Large letter","offer_id":58403857498499,"sku":"LBPB-LL1-N","price":0.5,"currency_code":"GBP","in_stock":false},{"title":"Size 2 \/ PiP: Large letter","offer_id":58403857564035,"sku":"LBPB-LL2-N","price":0.6,"currency_code":"GBP","in_stock":true},{"title":"Size 3 \/ PiP: Large letter","offer_id":58403857629571,"sku":"LBPB-LL3-N","price":0.7,"currency_code":"GBP","in_stock":false},{"title":"Size 4 \/ PiP: Large letter","offer_id":58403857695107,"sku":"LBPB-LL4-N","price":0.8,"currency_code":"GBP","in_stock":true},{"title":"Size 5 \/ PiP: Large letter","offer_id":58403857760643,"sku":"LBPB-LL5-N","price":1.5,"currency_code":"GBP","in_stock":true},{"title":"Size 6 \/ PiP: Small Parcel","offer_id":58403973005699,"sku":"LBPB-SP1-N","price":0.6,"currency_code":"GBP","in_stock":false},{"title":"Size 7 \/ PiP: Small Parcel","offer_id":58403973038467,"sku":"LBPB-SP2-N","price":0.8,"currency_code":"GBP","in_stock":true},{"title":"Size 8 \/ PiP: Small Parcel","offer_id":58403973071235,"sku":"LBPB-SP3-N","price":0.8,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1011\/4924\/5827\/files\/LetterBoxPostalBoxes.png?v=1783332625","url":"https:\/\/salisburypackandpost.co.uk\/products\/letterbox-postal-boxes-premium-size-1-8","provider":"Salisbury Pack \u0026 Post","version":"1.0","type":"link"}