--- product_id: 283959108 title: "Blake Purely Packaging C3 (A3) 450 x 324 mm Board Back Pocket Peel & Seal Envelopes (4200/50) Manilla - Pack of 50" brand: "blake" price: "€ 109.52" currency: EUR in_stock: true reviews_count: 5 category: "Blake" url: https://www.desertcart.hr/products/283959108-blake-purely-packaging-c3-a3-450-x-324-mm-board store_origin: HR region: Croatia --- # C3 size 450x324 mm - perfect fit Peel & Seal closure - secure & sleek 100% recycled fiberboard - eco-chic Blake Purely Packaging C3 (A3) 450 x 324 mm Board Back Pocket Peel & Seal Envelopes (4200/50) Manilla - Pack of 50 **Brand:** blake **Price:** € 109.52 **Availability:** ✅ In Stock ## Summary > ♻️ Secure your important mail with style and sustainability! ## Quick Answers - **What is this?** Blake Purely Packaging C3 (A3) 450 x 324 mm Board Back Pocket Peel & Seal Envelopes (4200/50) Manilla - Pack of 50 by blake - **How much does it cost?** € 109.52 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.hr](https://www.desertcart.hr/products/283959108-blake-purely-packaging-c3-a3-450-x-324-mm-board) ## Best For - blake enthusiasts ## Why This Product - Trusted blake brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Eco-Friendly Edge:** Crafted from 100% recycled materials, aligning your brand with sustainability values. - • **Clear Communication:** 'Please do not bend' printed boldly for extra care and professionalism. - • **Effortless Security:** Strong peel & seal closure ensures quick, tamper-proof mailing every time. - • **Bulk Pack Efficiency:** 50 envelopes per pack to keep your office stocked and your workflow uninterrupted. - • **Rigid Protection, Zero Compromise:** Heavy-duty board back shields certificates, photos, and prints from bending or damage. ## Overview Blake Purely Packaging C3 Board Back Peel & Seal Envelopes combine robust protection with eco-conscious design. Sized at 450 x 324 mm, these manilla envelopes feature a rigid fiberboard back to prevent bending of sensitive documents. The peel & seal closure offers quick, secure sealing, while the 'Please do not bend' print adds an extra layer of care. Sold in packs of 50, these 100% recycled envelopes are perfect for professionals who demand durability and sustainability in their office supplies. ## Description Product Description These 100% Recyclable Purely Packaging Board Back Envelopes By Blake Are Strong And Rigid, Made With High Quality Recycled Materials. The Mailers Safely Protect Bendable Items Such As Certificates, Photos And Prints, Whilst Their Recycled Content Helps To Make A Positive Contribution To The Environment. Set Contains: 50 envelopes Review: Ordered them in The Netherlands in October 2022, for my small art prints business. The the carton part is a liiitle bit thiner than the previos envelopes I ordered (the same brand), which I like even more. It IS thick enouph and does not bend under its own weight. Will definitely order again :) Review: Estupendo para enviar billetes o pequeños documentos que no quieres que se doblen. No me gusta las letras impresas abajo: "Please do not bend"( por favor no doblar) Me hubiera gustado que fuera en Castellano o que no pusiera nada.No me di cuenta de esto cuando los compré. Aparte de eso , son unos sobres mágnificos y muy baratos. ## Features - Make a difference to your mail with these Purely Packaging Board Back envelopes by Blake - Heavy Duty Board Back to protect certificates, photographs, prints and more - Strong Peel & Seal closure for ease of use, additional security and longer shelf life - Printed 'Please do not bend' on the face for extra safety - Printed Do Not Bend on the front ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B00O4X7W00 | | Additional Features | Heavy Duty,Recycled | | Best Sellers Rank | #80,672 in Office Products ( See Top 100 in Office Products ) #179 in Business Mailing Envelopes | | Brand Name | Blake | | Closure Type | Self-Seal | | Color | Manilla | | Customer Reviews | 4.6 4.6 out of 5 stars (2,552) | | Global Trade Identification Number | 05055559719472, 05055559753087 | | Item Dimensions L x W | 45L x 32.4W centimeters | | Item Shape | Rectangular | | Item Type Name | Purely Packaging C3 450x324mm Board Back Envelope Box of 50 | | Item Weight | 5.49 Pounds | | Manufacturer | Blake Envelopes | | Material Type | Fiberboard | | Model Name | Everyday - Board Back Envelopes | | Number of Items | 1 | | Occasion | Graduation | | Occasion Type | Graduation | | Recommended Uses For Product | Business, Envelopes, Invitation Card, Letter, Office | | Size | C3 450 x 324 mm | | Style | Pack of 50 (No Window) | | Unit Count | 50 Count | ## Product Details - **Brand:** Blake - **Closure type:** Self-Seal - **Colour:** Manilla - **Material:** Fiberboard - **Occasion:** Graduation ## Images ![Blake Purely Packaging C3 (A3) 450 x 324 mm Board Back Pocket Peel & Seal Envelopes (4200/50) Manilla - Pack of 50 - Image 1](https://m.media-amazon.com/images/I/81S2chsbi1L.jpg) ![Blake Purely Packaging C3 (A3) 450 x 324 mm Board Back Pocket Peel & Seal Envelopes (4200/50) Manilla - Pack of 50 - Image 2](https://m.media-amazon.com/images/I/51tbdcM9eDL.jpg) ![Blake Purely Packaging C3 (A3) 450 x 324 mm Board Back Pocket Peel & Seal Envelopes (4200/50) Manilla - Pack of 50 - Image 3](https://m.media-amazon.com/images/I/91pcEkCy2CL.jpg) ![Blake Purely Packaging C3 (A3) 450 x 324 mm Board Back Pocket Peel & Seal Envelopes (4200/50) Manilla - Pack of 50 - Image 4](https://m.media-amazon.com/images/I/71kt-dr7YoL.jpg) ![Blake Purely Packaging C3 (A3) 450 x 324 mm Board Back Pocket Peel & Seal Envelopes (4200/50) Manilla - Pack of 50 - Image 5](https://m.media-amazon.com/images/I/61bgTwDlhuL.jpg) ## Available Options This product comes in different **Color, Size, Style** options. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Review *by P***A on 21 October 2022* Ordered them in The Netherlands in October 2022, for my small art prints business. The the carton part is a liiitle bit thiner than the previos envelopes I ordered (the same brand), which I like even more. It IS thick enouph and does not bend under its own weight. Will definitely order again :) ### ⭐⭐⭐⭐⭐ Review *by D***O on 18 November 2019* Estupendo para enviar billetes o pequeños documentos que no quieres que se doblen. No me gusta las letras impresas abajo: "Please do not bend"( por favor no doblar) Me hubiera gustado que fuera en Castellano o que no pusiera nada.No me di cuenta de esto cuando los compré. Aparte de eso , son unos sobres mágnificos y muy baratos. ### ⭐⭐⭐⭐⭐ Review *by L***Z on 5 March 2024* Decent chipboard thickness. I use them to ship out stickers. Keep in mind that it doesn’t extend all the way, the dimensions of the chipboard area is probably around 4”x6” ## Frequently Bought Together - Blake Purely Packaging C3 (A3) 450 x 324 mm Board Back Pocket Peel & Seal Envelopes (4200/50) Manilla - Pack of 50 - A3 Cello Bags - Crystal Clear & Good Thickness - for A3 Artwork/Photos (420MM x 306MM) - Makes Your Work Feel Pricey - 30mm Seal - 40Micron - Super Strong Seams - House of Card & Paper Grey Kraft Board 1500micron 945gsm A3 Size 30 Sheets per Pack, HCP476 --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.hr/products/283959108-blake-purely-packaging-c3-a3-450-x-324-mm-board](https://www.desertcart.hr/products/283959108-blake-purely-packaging-c3-a3-450-x-324-mm-board) --- *Product available on Desertcart Croatia* *Store origin: HR* *Last updated: 2026-05-20*