International envelope Sizes / Application examples / Envelope formats / folds and sizes

 Folders and file sizes 

ISO 623 specifies the sizes of folders and files intended to receive either A4 sheets or simple folders (without back) that are not designed for any particular filing system or cabinet. The sizes specified are those of the overall rectangular surface when the folders of files are folded, exclusive any margin or tabs. Simple folders without back or mechanism are 220 X 315 mm large. Folders and files with a very small back (less than 25 mm) with or without mechanism are 240 X 320 large. Files with back (exceeding 25 mm) are 250 X 320 mm (without a mechanism) or 290 X 320 mm if they include a mechanism. All these are maximum dimensions. Standardizing folder and file sizes help in optimizing shelf look and handling even if folders from various manufacturers are used.