Easy to Assemble: These shipping boxes are simple and quick to assemble without glue, staples, or tape. Please refer to the guidance in the images or video. Crush Resistant: Compared with the traditional design, high-quality ECT-32 corrugated cardboard with slots makes the rectangular mailing boxes reliable and sturdy, and the standard 90°angles will protect the items inside. Widely Used: Recyclable 9 x 6 x3 shipping boxes fit for mailing, packaging, and storing small and lightweight fragile items, such as books, CDs, T-shirts, hats, mugs, and so on, can meet most shipping carrier specifications. Fine Kraft Paper Surface: No printings on the 9x6x3 small cardboard boxes and great for small businesses to display your brand, label, and gift stickers. Gives your products that professional final touch when reaching customers. Pack of 25: All 25 kraft brown mailer boxes are packed in a bigger carton to prevent damage during transit, and shipped flat to reduce volume and storage space.