Clear Mailing Bags A4 Plus size 230mm x 305mm 9.5" x 12" + Lip, Qty 100 100% Opaque-100% Recyclable size 230mm x 305mm 9.5" x 12"- Our Clear mailing bags are manufactured to high tollerancesand that gives the bags strength . We also make them thicker than our competitors, The thickness of the film is 55mu or 200gauge, weight is Approx 11 gramms per bag +/- All of our Plastic postage bags are made from Strong Polythene LDPE and are 55 Micron thicknes, They have a permanent Peel and seal closure with high tear resistance. How to find the correct bag for the items you are despatching, firstly lay out your item and measure the long and short dimensions of it, and then check the sizes quoted in the Heading above are close to the size you need , The sizes quoted don’t include the flap.