[mizzouman_2000@hotmai]

I believe its from the Kallax collection and you buy each 2 drawer insert for the square in the shelf unit. In person at IKEA you get to see. Or like I did at the bottom for misc stuff. I used the cardboard storage box dividers to cut the drawer into 3 rows of toploaders. Many options and not cheap. For me I was fed up with dozens of cardboard boxes to go through looking for a card so it was worth it to me and the wife likes it better than a bunch of white storage boxes everywhere. I love this setup, I have a smaller 2nd one too. The inserts will fit other shelfs too as long as the measurements are close.

That's  a pretty slick set up.