Recently appeared Nokia Lumia 625 renders and spec sheet suggest that Nokia's upcoming announcement "Something BIG landing here" today is none other than the largest Lumia ever Nokia Lumia 625 with 4.7" screen size. This leak was done by Finnish publications Puhelinvertailu which of course matches the specifications spotted few days earlier.
It's just a few days ago when the Nokia Lumia 1020 got announced. Following that, Nokia seems to have another Windows Phone 8 device, rather bigger with 4.7" screen, Lumia 625. China's official radio communication devices regulator has posted the reference images and illustrations of the device on their website.