Pack of 12 A3 Blue Zip Zippy Bags. Pack of 12 A3 Blue Zip Zippy Storage Bags by Janrax. Strong, durable and weatherproof. Size: A3 (428 x 320 mm). Space on the front to put a business card or name card. Slide lock protects contents from dirt and moisture. Thickness 180 microns. Ideal for School, Home and Office. Other colours available in the Janrax range.