Sony is working on a 12-inch tablet, a rumor originating with "Taiwan-based supply chain makers" claims. This tablet is reportedly going to become available in the first quarter of next year, so before the end of March.
It will be a high-end slate, and will also feature a stylus, apparently targeting markets with demand for graphics-related applications.
Unfortunately, no other details are known at this point. So far, the Xperia Z2 Tablet (pictured above) is Sony's biggest offering in this space, coming with a 10.1-inch touchscreen.
Since the source of this rumor has a rather shaky record, you should definitely take this with a hefty dose of salt, at least until we get another report on the matter. Many mobile device makers have been rumored to step into the huge tablet business, but so far few have actually done that.
If this information does pan out, then it looks like Sony will position its big tablet as a direct competitor to Samsung's 12.2-inch Galaxy Note Pro, which also has a stylus.