38g per piece A4 size business letter case Shipped with tracking. A4 size envelope A size that perfectly fits A4 size magazines and documents. This is an A4 size envelope-style business letter case. With an opening zipper (perforation). A4 size inexpensive cardboard case It is more affordable than cardboard cases of the same size. Because it is an envelope-style case, there is no need to assemble it. Double-sided tape is attached to the lid, allowing for efficient packing work. Easy to open with an opening zipper! The recipient can easily open it without having to peel off tape. #888 Envelope External dimensions Length 229mm x Width 323mm + Flap 55mm * External dimensions are calculated dimensions. * Slight errors may occur due to the swelling of the contents, the way the box is assembled and distortions, and manufacturing dimensional errors. * There is a slight smell because it is new. * Simple packaging for environmental consideration.