MERV 8 Air Filter/Furnace Filters 4pk

what is the form factor / size of these?

Filters are pointless if they are the wrong size. Need the size specs.

12x30x1 (11.5x29.5) MERV 8 Air Filter/Furnace Filters (4 pack)

It’s in the title. :slight_smile:
12x30x1 (11.5x29.5)