Is Windows 7 Install CD 32-bit or 64-bit?

I know this might seem a bit out dated, but I needed to know the Windows 7 Install CD I had if it was 32 or 64-bit. There are 3 ways to know:

Drive Root

Quickest way is to go to the drive root. If you have a file named Bootmgr.efi you are running a X64/64-bit version.

Disk Size

Next way is disk size, the x86/32-bit version comes out at ~2.32GB whilst the x64/64-bit version comes out at ~3.0GB.

Autorun.inf file

Finally, you can go to the drive root and open the autorun.inf file.

In notepad, the 64 bit version shows:

[AutoRun.Amd64]
open=setup.exe
icon=setup.exe,0

[AutoRun]
open=sourcessperr32.exe x64
icon=sourcessperr32.exe,0

The 32 bit version shows:

[Autorun]
open=setup.exe
icon=setup.exe,0