Product review (5 stars): Electrolux 240534901 Door Rack for Refrigerator
Fits the door shelf for Frigidaire FRT21P5AWG.  The description says 35 x 3.8 x 6.2 so I was confused because the shelves are about 25 inches across in my fridge but the part number matched.  Glad I got it, been living without one of the shelves for almost 4 years.  This is so much more convenient.  Thanks Amazon and other customers for answering questions about the size.