Did you mean to say this ?
"My C partition is smaller than the ssd size."
Or did you mean
"My C partition is larger than the ssd size."
As "larger" presents slightly more of a problem.
Smaller would be no problem at all. You could
even use Macrium Reflect Free in that case. Or
just about anything.
Disk Management should have some options for you.
The Disk Management "shrink" function can shrink
easily by up to 50%. So if you had a 320GB C: partition,
you could reduce it to 160GB, then use whatever tool
you want, to transfer to the SSD. (This assumes it
has less than 160GB of information stored on it
of course, and is mainly empty.) If you want more
"shrink" than that, a partition manager can do that
for you. Maybe even GParted (as long as you had
backups first).
As far as I know, Windows 7 should be consistent
about partition alignment. It uses "megabyte" alignment,
which is suited to SSDs. If copying, it's probably good
enough to just clone the disk as is. If you were
going from an older CHS (sector 63) aligned disk, to
a megabyte aligned setup, then the tools might have
to be a bit more functional.
They make an actual tool, to take CHS aligned things,
and megabyte align them. If an SSD was set up on an older
OS first, and was CHS aligned (sucking some of the
performance out of it), you could use this to realign
the partition so the clusters line up with the flash
block structure. Personally, I'd just do this by hand.
Or, at least I'd try.
http://www.paragon-software.com/home/partition-alignment/
For fun, I already tried such a thing. I tried to change
the alignment of some partitions here, but I couldn't get
the thing to boot any more
Of course, I had a backup,
and put it all back again. I think the trick was to change
the CHS geometry to 56 from 63 sectors, something like that.
Maybe it was fixboot that didn't do the right thing, but,
it wouldn't boot after I was finished. Still, it was a fun
experiment to try out. (I get a kick out of blowing things
up and then gluing them back together again.) If you want
to experiment, there's probably a web page with your
name on it out there...
Paul