Minimum HDD size for Centos 6

the minimum hdd space needed for Centos 6 without any package is 4GB:

100MB   -> /boot
2000MB -> /
300MB   -> Swap
200MB   -> /home
500MB   -> /tmp
remain     -> /var


but if you want the minimum hdd space for Centos 6 with base package, it is 5GB:


100MB   -> /boot
3000MB -> /
300MB   -> Swap
200MB   -> /home
500MB   -> /tmp
remain     -> /var