Are those little compartments 1.5" or 2.5"? I don't keep 1.5" squares anymore... just the 2 and 2.5.
Right now I have mine stacked just like that, minus the dividers, in those stacking drawer units. I have about 3 drawer's worth of 2.5s! I really just need to make a big quilt with them to make room for more. I was thinking about doing a scrappy Irish Chain, if I have enough neutrals.