Need sturdy boxes for shipping? This pack of 50 corrugated mailers is perfect for books, small items, documents, and more. Each box measures 10x3x12.5 inches inside, made from tough cardboard sourced right here in the USA. They’re side-loading with a flip-top lid — super easy to pack and seal. Great for eBay, Etsy, or small business shipping. Lightweight but strong enough to protect your items in transit. No Prop 65 warning here, and they’re made by Stanbury Street, a trusted name in packaging. Whether you’re mailing out products or storing small items, these boxes are reliable and professional-looking. Recyclable too! Each box is single-wall but seriously durable. Perfect for small businesses, crafters, or anyone who ships regularly. Stock up now and save yourself last-minute packing stress!