20 RESPICAIRE MICROCLEAN 95 AND EM PURECLEAN 95 AIR CLEANER COMPATIBLE FILTERS ( 10 FILTER CHANGES ) ALL SIZE AVAILABLE DO NOT MEASURE THE FILTER MEDIA ITSELF. There is a label right on the black plastic part at the top near where the power supply plugs in. Can't find it? Look inside the track of the black plastic part. This label gives the dimensions to order by. Can't find a label? Measure the entire air cleaner end-to-end and top-to-bottom including the entire frame and black plastic part at the top. DO NOT MEASURE THE FILTER PAD ITSELF. Replacement Media Pads Only , NO FRAME INCLUDED