This script will set a metadata value for selected surfaces, using it's area value. Then it isolates those surfaces with specific user selected area value.

Run script e.g. from DropDown  File > Load > Script

Select surfaces to check and assign area metadata:

Enter area target value:

Enter delta value:

The selected surfaces get metadata assigned ("Area") and are checked

area-of-surf  <>  area target value +/- delta

If area value fits equation, then these surfaces get isolated in the display:

See the metada assigned from the Entity Editor: