These are nice.  I ordered two and stacked them.  I zip-tied them together to make them a bit sturdier as when stacking, they just kind of sit on top of the pins on either side. 

Seemed pricey for the two but I have had many other kinds that aren’t as sturdy and kept coming apart.  I put them in our coat closet against the wall.  Fits 4 pairs Adult shoes across each shelf and flip flops slide nicely under bottom shelf.

Assembly only took 5 minutes.  I would buy them again.