Hi Kris,

There used be available the Sony ICF-SW100 World Band Radio. It was extremely compact for its performance still being a full Digital PLL SSB capable SW radio. I can't think of anything which is currently smaller than this for its performance. It was also very expensive at around $300-350 USD.

http://www.sony.co.uk/view/ShowProduct.a...ldband+Receiver

But I can't find any online retailer still stocking this particular model as it appears to be discontinued.