Product size states 20x25x4. Inconspicuously designated as slim fit. Actual size is 19.5x24.5x3.25. This is new. I have purchased this product for many years. This is the first time I have encountered this.

Put the model 16x25x4 in Bryant furnace, after one run the cardboard retaining material was sucked in and had to destroy it to get it out. As a 3M stockholder I am not happy\.

[This review was collected as part of a promotion.] I have been using the Healthy Living filters for years (1550, 16x25x4). They work great and help to remove dust, pollen, and pet dander, so I can breathe easier with my allergies.

[Employee of 3m-filtrete] I am fairly diligent in changing the air filter in pur home. The amount of dust that is filtered out of the air is amazing. Thanks for this great product.

This filter removes all of the smells we've gone nose blind to over time. The other day I cooked some fresh fish and ran out for an errand. When I came back I could not tell what we had for dinner. Can't say the same at my neighbor's house!

Purchased this after some work on air conditioner. I will continue to purchase these filters as opposed to the cheap ones. Improvements in odor, dust.

Sadness that all the sizes are not offered.

Keeps my allergies to the cat at a minimum. Wish it was a bit more affordable since I have 4 returns.

These filters do an excellent job! I always swap them out twice yearly and they keep the air in my home clean and fresh.

When my electronic filter stopped working I replaced the electronic filter with a 4" Filtrete and it worked great.