Poketo : Accordion Pro Filer :

The dreamiest organizational tool for all of your planning, developing, and creating. These accordion filers feature 12 vibrantly coloured and patterned subfolders that expand and contract, with hard-covered exterior and an elastic closure to keep it tight. 

Measures: 13.75 x 9.8 x 0.5 in (large); 9.75 x 6.8 x 0.5 in (small)
Weighs: 21.1oz (large); 9.3oz (small)