--- product_id: 188877003 title: "BOX USA Rigid Mailers 12\" x 15\" (100-Pack) - Cardboard Mailer Envelopes for Photos, Artwork, Certificates - Stay Flat" brand: "box usa" price: "฿14273" currency: THB in_stock: true reviews_count: 8 category: "Box Usa" url: https://www.desertcart.co.th/products/188877003-box-usa-rigid-mailers-12-x-15-100-pack-cardboard store_origin: TH region: Thailand --- # 12" x 15" oversized size 100-pack bulk value Rigid, stay-flat protection BOX USA Rigid Mailers 12" x 15" (100-Pack) - Cardboard Mailer Envelopes for Photos, Artwork, Certificates - Stay Flat **Brand:** box usa **Price:** ฿14273 **Availability:** ✅ In Stock ## Summary > 🛡️ Protect your brand with every shipment—stay flat, stay flawless! ## Quick Answers - **What is this?** BOX USA Rigid Mailers 12" x 15" (100-Pack) - Cardboard Mailer Envelopes for Photos, Artwork, Certificates - Stay Flat by box usa - **How much does it cost?** ฿14273 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.co.th](https://www.desertcart.co.th/products/188877003-box-usa-rigid-mailers-12-x-15-100-pack-cardboard) ## Best For - box usa enthusiasts ## Why This Product - Trusted box usa brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Bulk 100-Pack Value:** Stock up and save with 100 durable mailers—ideal for busy offices, e-commerce pros, and creative studios. - • **Generous 12" x 15" Size:** Perfectly sized for large prints and paperwork, ensuring your important items arrive flawless and professional. - • **Stay-Flat Rigid Protection:** Heavy-duty cardboard mailers that keep your photos, artwork, and documents pristine—no bends, no wrinkles. - • **Versatile Multi-Use Design:** From shipping to storage, these mailers handle everything—certificates, photos, brochures—with reliable, eco-friendly cardboard. - • **Clean, Professional Presentation:** Bright white, sleek envelopes that elevate your brand’s image and make every shipment look polished and trustworthy. ## Overview BOX USA Rigid Mailers 12" x 15" (100-Pack) are heavy-duty, stay-flat cardboard envelopes designed to protect large photos, artwork, certificates, and documents during shipping. Featuring a peel-and-seal adhesive for quick, secure packing, these bright white mailers combine professional presentation with durable, eco-friendly materials. Ideal for businesses and creatives needing bulk, reliable packaging that meets USPS and commercial carrier standards. ## Description BOX USA Stayflat Flat Mailers offer dependable packaging for documents, photos, artwork, and marketing materials. These rigid envelopes are crafted from sturdy chipboard to keep contents flat and secure during shipping and handling. Our stayflat design eliminates bending of contents without the need for extra inserts or stiffeners, ensuring arrival looking professional and undamaged. Each mailer is lightweight, helping to save on postage while still providing excellent rigidity and meet the needs of USPS First Class, Priority Mail, and commercial carrier requirements. These mailers feature a reliable peel-and-seal adhesive strip that makes packing quick, clean, and secure protecting against tampering while providing moisture resistance. For companies managing large order volumes, BOX USA offers bulk packs of 100 or more in multiple sizes making them ideal for e-commerce sellers, fulfillment centers, print shops, and offices that need consistent, professional packaging. Many small businesses use these flat mailers for shipping brochures, photos, invoices, or product literature, while creative professionals rely on them for mailing artwork, proofs, or promotional pieces. The versatile design also makes them suitable for mailing books, magazines, calendars, and other media that must stay flat. Review: Very sturdy great product - I was buying another brand, but they seemed to switch to a thinner product, so I tried these instead. They come in a larger bulk pack at a lower price per unit, and they’re thick, durable, and surprisingly ridged . I ship a lot of vintage magazines, and these are absolutely perfect for keeping them safe during shipping Review: Good for signed documents, holds up to USPS handling. - Hefty cardboard, great glue strip. Keeps my signed documents safe, and extra safe with added slip of cardboard. Of the hundreds I have shipped, USPS only was able to "mangle" two of them. No complaints from my customers, no extra taping needed. Great product, made in the USA. ## Features - STAY-FLAT RIGID PROTECTION: Heavy-duty self sealing rigid mailers made from sturdy cardboard to help keep contents flat and protected in transit—ideal stay flat mailers to protect photos, artwork, certificates, and important documents. - 12" x 15" SIZE FOR LARGE ITEMS: Oversized cardboard mailer envelopes designed for larger prints and paperwork—great photo mailers and document mailer option when you need wide coverage and clean edges. - BULK 100 PACK VALUE: Stock up for home businesses, offices, and shipping stations—100 count cardboard envelopes for consistent packing, faster fulfillment, and better cost-per-mailer. - CLEAN, PROFESSIONAL LOOK: Bright white, presentation-ready hard envelopes for mailing that look sharp for clients, classrooms, studios, and official document shipments—easy to label and barcode. - SHIPPING + STORAGE MULTI-USE: Use as do not bend envelopes, for eCommerce fulfillment, photo & art, certificate mailing, or flat storage—reliable cardboard mailers for shipping, packaging, and organization. Made in USA & made of recycled materials ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B081ZRVN8S | | Additional Features | Lightweight, Reusable, Scratch Resistant, Self-Adhesive Closure, Tear Resistant | | Best Sellers Rank | #9,255 in Office Products ( See Top 100 in Office Products ) #127 in Envelope Mailers | | Brand Name | BOX USA | | Closure Type | Self-Seal | | Color | White | | Customer Reviews | 4.8 4.8 out of 5 stars (578) | | Global Trade Identification Number | 00193116472080 | | Included Components | Flat Mailers | | Item Dimensions L x W | 15"L x 12.75"W | | Item Shape | Rectangular | | Item Weight | 33.96 Pounds | | Manufacturer | Box USA | | Material Type | Cardboard | | Model Name | BURM4SS | | Number of Items | 100 | | Occasion | all occasions | | Occasion Type | Business | | Recommended Uses For Product | Letter | | Size | 12 3/4x15" 100-Pk | | Style | Flat | | UPC | 193116472080 | | Unit Count | 100 Count | ## Product Details - **Brand:** BOX USA - **Closure Type:** Self-Seal - **Color:** White - **Material:** Cardboard - **Occasion:** all occasions ## Images ![BOX USA Rigid Mailers 12" x 15" (100-Pack) - Cardboard Mailer Envelopes for Photos, Artwork, Certificates - Stay Flat - Image 1](https://m.media-amazon.com/images/I/51yXf46W+8L.jpg) ![BOX USA Rigid Mailers 12" x 15" (100-Pack) - Cardboard Mailer Envelopes for Photos, Artwork, Certificates - Stay Flat - Image 2](https://m.media-amazon.com/images/I/71vcSzrITUL.jpg) ![BOX USA Rigid Mailers 12" x 15" (100-Pack) - Cardboard Mailer Envelopes for Photos, Artwork, Certificates - Stay Flat - Image 3](https://m.media-amazon.com/images/I/71u5edt99QL.jpg) ![BOX USA Rigid Mailers 12" x 15" (100-Pack) - Cardboard Mailer Envelopes for Photos, Artwork, Certificates - Stay Flat - Image 4](https://m.media-amazon.com/images/I/71fCJRovoYL.jpg) ![BOX USA Rigid Mailers 12" x 15" (100-Pack) - Cardboard Mailer Envelopes for Photos, Artwork, Certificates - Stay Flat - Image 5](https://m.media-amazon.com/images/I/71mu2omky2L.jpg) ## Available Options This product comes in different **Size** options. ## Questions & Answers **Q: What is the weight per 12.75 x 15 mailer?** A: 5.4 oz **Q: How much does one mailer weigh in ounces?** A: My scale says 3.4 ounces. **Q: Are these suitable for a heavy book (5 or 6 lbs)? Thanks.** A: Depends on shape and thickness of book. I would use a poly mailer instead as a heavy book could split the seams of mailer and potentially fall out. **Q: How much does one mailer weigh?** A: Not sure of the weight but I used them to mail portrait packages with 3 8x10’s in each stay flat mailer. The least expensive method to mail was 1.67 through USPS ## Customer Reviews ### ⭐⭐⭐⭐⭐ Very sturdy great product *by W***N on February 14, 2026* I was buying another brand, but they seemed to switch to a thinner product, so I tried these instead. They come in a larger bulk pack at a lower price per unit, and they’re thick, durable, and surprisingly ridged . I ship a lot of vintage magazines, and these are absolutely perfect for keeping them safe during shipping ### ⭐⭐⭐⭐⭐ Good for signed documents, holds up to USPS handling. *by N***. on November 4, 2025* Hefty cardboard, great glue strip. Keeps my signed documents safe, and extra safe with added slip of cardboard. Of the hundreds I have shipped, USPS only was able to "mangle" two of them. No complaints from my customers, no extra taping needed. Great product, made in the USA. ### ⭐⭐⭐⭐⭐ Perfect For Standard Size Magazines ! *by J***S on October 15, 2025* I needed these for shipping my standard size magazines and comics. You can't beat the price. I run a small online business so I have to watch my costs. The price was fantastic! Very sturdy! --- ## 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.co.th/products/188877003-box-usa-rigid-mailers-12-x-15-100-pack-cardboard](https://www.desertcart.co.th/products/188877003-box-usa-rigid-mailers-12-x-15-100-pack-cardboard) --- *Product available on Desertcart Thailand* *Store origin: TH* *Last updated: 2026-04-30*