Easy to Assemble: These small shipping boxes are simple and quick to assemble without glue, staples or tapes. 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 items inside while delivery. Widely Used: Recyclable 6 x 4 x 3 shipping box 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 carrier specifications. Fine Kraft Paper Surface: No printings on the 6x4x3 cardboard boxes for shipping 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 50: The size of white cardboard boxes is 6 x 4 x 3 boxes, and 50 mailer boxes are packaged in a carton. flat shipping flat packaging saves space and makes storage more convenient. These sturdy white mailing boxes measure 6x4x3 inches(external dimensions) and practice perfectly in small-item packing, shipping, mailing and storing.