Leftover piece from the discontinued IKEA Algot modular closet collection. If you find yourself with a nearly-complete closet from this collection but lacking just one shelf, know that IKEA doesn't make this series anymore, so would rather you throw it all away and buy the new one. Not so fast, greedy Swedes!
Shelf measures 23.5” wide x 7” deep. The sides have the clips to attach to the Algot brackets.