Product review (5 stars): Fits my Kenmore 41153 / Whirlpool WRS325FNAM perfectly
I have a Kenmore 41153 which is a rebadged/rebranded Whirlpool WRS325FNAM, and this is a perfect fit. The mounting mechanism is more of a tab and less of a solid wedge piece compared to my stock refrigerator door bin, but it fits easily and well.  There is a white plastic trim along the top edge and a textured surface on the inside bottom.

Based on my research this will fit all Whirlpool WRS325* and WRS322* models, as they use the same mounting system and have the same width refrigerator door bins.