Not even close to size. The filters were supposed to be Merv 13 20x25x4. The actual size is 19-7/16 x 24-7/16 x 3-11/16. Needless to say they did not fit my filterbox and air can freely flow around the filter. Compared them to the Honeywell filter that came with my furnace and that one was sized as labeled. Who knows what the actual Merv rating is on that filter if they "cheat" on the size. Edit: After contacting Filterbuy, they have offered a full refund.

The customer service was great The customer service was great. I needed a filter that was no longer listed by size. Other attempts to locate the filer met with negative results. Upon contacting filterbuy, their customer service took the time to assist me in getting the filter I needed.

Customer service A+ Could not be happier with them. I originally made an order, I messed up the order, I waited five months to please exchange my order and Not only did they send me the correct filters, they told me to keep the ones that were wrong. Customer service A+

Avoid at all costs They sell filters that say they are a certain size (20x20x4) for example but they send filters that are 19.25x19.25x3.25. When I complained, they said to read the fine print on their website.

Smaller Than Standard 20x20x4 Filter Size The positive: good price and fast shipping. The negative: Their 20x20x4 Filters are much smaller than 20x20x4 filters made by the name brands. As a result, they don't fit properly in my air handler. Rather than pay to send them back, I am going to glue a cardboard frame to them to make them fit properly. In addition, the manufacturing quality of the filters are suspect. Name brands have spacers that keep the pleats evenly spaced. These Filterbuy filter pleats are not evenly spaced and the pleats are bunched up near the edges. They are also glued into place and cannot be adjusted. Save yourself the hassle and get name brand filters or be sure to verify that the ACTUAL size of the filter will fit your application.