According to the Blockchain.info, the size is 12,107 MB right now. But it can take more space in your system.
That's fine, I was just a bit worried it would be like 50GB and I'd hit my data cap.
You should be careful about running a full node on the PC once the blockchain's sync'd. Especially if you have high bandwidth, you'll very quickly run into your limit through sharing blocks and relaying transactions.
So, what do we do to avoid running as full node? I'm downloading the bootstrap file separately from source forge, and it's 9.9 gb zipped, should be done by the morning and then there will be some catching up for it to do but at least it will save my hard drive.
PS
Download Link:
https://sourceforge.net/projects/bitcoinblockchain/files/29-10-2013/ Download Size: 9GB (Compressed) - 13GB (Decompressed)
Re-directs to the most recent version.
You can even get a torrent for it.