Caliza HVAC Pack — 15x20x1 MERV 11 (6-pack)

15x20x1 MERV 11 pleated furnace filter, 6-pack. Nominal size 15×20×1; actual size is typically about 14.75×19.75×0.75 inches — measure your old filter before ordering. Aerostar filters manufactured in Orlando, FL via Factory Direct Filters. Replace about every 60–90 days under normal use.

This shows the type of filter. It may not be the exact size. Use the dimensions in the title.