30 x self seal mailing bags mixed sizes, grey strong postage bags for packing parcels strong self seal, 3 sizes, 10 from each size.\n\nThe bags come in 3 different sizes (10 from each size), measuring 5\"" x 7\"", 6\"" x 9\"" and 9\"" x 12\"", and are all made from 60 microns of tear-resistant and waterproof poly material.\nThe self-seal and peel-and-seal features ensure that your mail is safe and secure, while the 100% recyclable design makes it an eco-friendly choice.\nThese mailing bags are ideal for sending letters, documents, and small parcels, and are suitable for both personal and business use.\nThese Opaque Mailing bags incorporate a permanent self-seal closure and are made from an opaque 60 micron film. Our posting bags have a self-adhesive strong closure. These air sealed postage bags are water and dirt resistant and made to secure the inside and outside.\n\nSafe and Secure Package Bags:- These plastic mailers have a sticky strip for easy closure. Once sealed, these bags are very.