The screen on the device is 6 inches and can hold three medium tiles across the screen, or one medium and one large tile side-by-side. In addition to the size of the screen, we are also told the device is thin although you might not be able to get that impression of it by looking at the picture.
A little more than a week ago, we passed along a report stating that Nokia is prepping a 6 inch model that would be launched in Q4 of this year. Nokia could be waiting for the GDR3 update to Windows Phone 8 as that will bring support for 1080 x 1920 (FHD) displays.
source: @dahnyelperro via WMPoweruser