True Image Partition Size

Hello,
i use True Image.
I do an Image from a physical 2003 Server.
The size from partition C:\ is 30 GB and from partition D:\ is 40 GB.
The data on C:\ is 10 GB and on D:\ 15 GB.
Now i do an image and recover it on a virtual maschine.
The size from the disk on my VM is only 35 GB.

After recovery.......
.....partition C:\ have a size from 10 GB and D:\ from 25 GB.
Can i set the size in True Image or do that True Image automatically eg. a % value?

Thanks for answer
Dennis