Rebuildable organizer. You can combine12 boxes in different sizes, plus 3 special boxes for phone tablet and calculator. Stend is easy printable. Maximum width for tablet is 163mm. Phone size in box with calculator is maximal 11 x 93mm, calculator size is max. 15 x 93mm. Box for phone with cover is includet too. Inside width boxes is 28.5mm. Maximal dimensions for complete organizer are 168.5 x 168.5 x 104(height)mm. Papers size is 90 x 90mm. Thanks for your interest.