Lightahead LA-7569 (Sturdy .50mm thickness) US LETTER/A4 Secure Document Flap Folder Very spacious can Hold up to 100 A-4 or US letter size documents.Sturdy High Quality .55mm Thickness Cover flap and elastic cord secures contents US Letter A4 size / Tranluscent folder PP texture:four color printing. Thickness:0.50mm Ideal for Students ,Executives on the go or for anyone wanting to secure their important documents.