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.
Well while I've got a data cap at the moment, I'll be moving to Australia in the next 2-3 months where I'll get an unlimited connection - so it should only be a temporary problem. In the meantime though, is there any way I can stop my full node from operating if it ends up using too much data? I assume closing the wallet client won't do anything...