From the European perspective - How Sandy compares to Europe, (size-wise) from BBC News http://www.bbc.co.uk/news/world-us-canada-20123703
Hurricane Sandy in perspective, taking up roughly one third of the US mainland. (but confusingly enough from this graphic, not located correctly on the map! Just inserted in the middle of the continent for size comparison's sake!)
And check out these Before and After aerial photos of Sandy's destructive force along the New Jersey coast at http://www.abc.net.au/news/specials/hurricane-sandy-before-after-photos/
Thanks, Stephen Franciosa, for sending the link.