designer's own words:This folder functions by artisan cuts . They produce a new quality this item . By craftsman’s techniques , it functions intelligently and exists beautifully than usual . A small part makes a big diffelent , that is the intelligent hand , this design expresses . This folder is applicable to document , CD and photo folder as a home accessory . document folder (for A4) : 230x315x45mm , CD case :135x150x30mm . Material : PVC foam sheet ( bendy plastic sheet ) .