Product review (5 stars): Great filter
I ordered a pair of these with hesitation as there are so many bad reviews saying they are not the same size as the MD1-0002, but I thought, why not, if it doesn't fit I can simply return them.

They fit perfectly on my Vornado humidifier, they are the same size as the MD1-0002 Vornado Humidifier Replacement Filter, and they are the Vornado brand.

I don't understand why there are so many bad review, but now I'm doubting those reviewers and thinking they may be a competitor who doesn't want people to buy these, as they are pretty cheap.  Hope this helps others.