They fit! I can't get over how this box of 12-count Great Value brand of Toaster Pastries  fits in my IKEA cubby. If you sit two boxes next to one another it fills the space nicely. If you cut the top flaps off and lay the box down on its widest side it becomes a shelf. Then, stack away into a cute recycle shelf for those small hand-wound cakes of yarn. It's so fun to store yarn in the front half the usual way and now in the back half of just one cubby shelf.  I get to eat toaster pastries and recycle at the same time! Maybe next I can glue multiples together and decorate them. I need to also check to see if it fits in the Better Homes & Garden brand cubby just as well!