JAM Paper® Red #10 Plastic Envelopes with Zip Closures are 5 x 10 inches in size and have a 1 inch expansion. Made of durable and slightly flexible plastic, these envelopes are great for storing receipts, coupons, note cards, mementos, folded documents, pens, pencils, and more! This pack contains 12 envelopes for multiple uses! The zip closures of these envelopes allow for quick and reliable opening and closing. Use them to store small papers and items in drawers or on shelves, or put them in your bag or brief case to keep items safe in transport. Their semi-transparent, vibrant red color is sure to stand out at the office and help you to be more alert throughout the day.