I bought two Shelf Advance (dark brown) 62cm wide units, and I bought the matching storage cases online: four N-in-Box regular-size units, four half-width units, four half-height units, and four quarter-height units, along with lids for each size. I had been using two 5-drawer wooden chests of drawers side by side, but I got rid of them because I was worried about the humidity, and I set up the Shelf Advance N-in Box in the space between them to create a tidy storage area. I haven't got all the boxes yet, but I'm in the middle of a spring cleaning and redecorating project, so I've just put in as much as will fit in here.