That's not a number. Which number do you prefer?
It would have to be 16 if you wanted to include all FBS Champions. I don't think they would do 12 and only have two at larges.
Here's what a a 16 team playoff would look have looked like the last 2 seasons:
2020:
1) Alabama - SEC Champion
16) Ball State - MAC Champion
8) Cincinnati - AAC Champion
9) Georgia - At Large #4
4) Notre Dame - At Large #1
13) San Jose State - MWC Champion
5) Texas A&M - At Large #2
12) Coastal Carolina - Sun Belt Champion
6) Oklahoma - Big 12 Champion
11) Indiana - At Large #6
3) Ohio State - Big Ten Champion
14) Oregon - PAC 12 Champion
7) Florida - At Large #3
10) Iowa State - At Large #5
2) Clemson - ACC Champion
15) UAB - CUSA Champion
2019:
1) LSU - SEC Champion
16) Miami OH - MAC Champion
8) Wisconsin - At Large #3
9) Florida - At Large #4
4) Oklahoma - Big 12 Champion
13) Boise State - MWC Champion
5) Georgia - At Large #1
12) Memphis - AAC Champion
6) Oregon - PAC 12 Champion
11) Utah - At Large #6
3) Clemson - ACC Champion
14) Appalachian State - Sun Belt Champion
7) Baylor - At Large #2
10) Penn State - At Large #5
2) Ohio State - Big Ten Champion
15) Florida Atlantic - CUSA Champion