I originally purchased 2 sets of these.  One for my laundry room where my kids shoes seem the end up and one for my own closet.  Due to the height in my closet and my clothes hanging down I choose to keep them separated(2 shelves instead of stacking making them 4).  It’s perfect!  So perfect that I purchased a third set to put in s closet for the rest of my kids shoes!  It keeps everything organized and really complements the rooms!