Diy Collapsible Storage Bin . Then fold each end towards the back about 3/4 of an inch. You can make any size you wish, with minimal math required. Mainstays Collapsible Fabric Cube Storage Bins (10.5" x 10.5"), 4 Pack from www.walmart.com They are beautiful, presentable as gifts, complement your home decor, save space and most importantly, they come with a free tutorial to guide you as you diy without stress. 1 1/8 yard outer fabric; Cut the front/back panels of the box to the desired size, plus a couple inches for a tab.