Sony has announced a waterproof Android smartphone with a 6.4in screen (16.3cm).
The firm is pitching the Xperia Z Ultra as being the slimmest large-screened handset on the market.
It can also accept sketches or notes written using a standard pencil or metal-tipped pen in addition to an optional stylus.
The firm says it intends for the device to challenge Samsung's dominance of the jumbo-sized handset sector.
According to a study by consultants Transparency Market Research, Samsung accounted for 70% of the overall "superphone and phablet" market in 2012 thanks to the popularity of models including the Galaxy S3 and Galaxy Note 2.
Earlier this year, it added the Galaxy S4 and Galaxy Mega - a 6.3in-screened handset - to its line-up.
Sony already offers a 5in handset of its own, the original Xperia Z, which it unveiled in January.
BBC News - Sony launches giant waterproof Xperia Z Ultra phone
These phones keep getting bigger and bigger. You would be a mug to jump in until they peak so I am going to hold out for a really big one.
Hello... Hello... no, I'm in the park!!! No, THE PARK!!