AUCH US LETTER/A4 size,Premium Quality/High-grade Office Meeting Thickener Waterproof File/Document/Paper Bag/Pocket/Folder/Poly Envelopewith Snap Button,Black High Quality Clear document bag with snap button . Can hold US Letter / A4 size,convenient and useful. Very professional and modern,ideal for the important file's storing Bright Colors,reinforce fun and color to your work Made of high quality PP plastic,durable and waterproof