Like others, I didn't seem to check measurements or read reviews before buying. Compared to the existing filter, it is almost an inch smaller in all dimensions, reducing efficiency and fit. Technically it will work in my oven, yes. But overall it's too small to use. Get what you pay for the situation. If you buy cheap, you get 2/3 of the product. But I think it's easier for the seller to say it's 16 x 20 x 4 than to list the dimensions, which are actually in the title and don't really fit every