Earlier in the week, the first detail of the Galaxy S23 Ultra's 200 MP cameras surfaced. Said leak revealed the identity of the sensor in question—the ISOCELL HP2—and a new rumor has now provided some more information which may, sadly, deflate expectations.
As revealed by Ice Universe, the Galaxy S23 Ultra's 200 MP sensor will have a native pixel size of 0.6 um. That's, perhaps, the most important information on the sensor, as it also gives a clue as to how large exactly the HP2 is. For some perspective, Samsung's other premium 200 MP sensor, the ISOCELL HP1, has a native pixel size of 0.64 μm. In all likelihood, the HP2 shares that pixel pitch, which would also mean it's the exact same size as the HP1—1/1.22". At 0.6μm, it'd be even smaller than that.
From all indications, the Galaxy S23 Ultra's 200 MP camera will share most specifications with the ISOCELL HP1 which will debut on the Moto X30 Pro next week. The new sensor will likely also output 12.5 MP images after 16-in-1 binning. That would mirror the relationship between the Mi Note 10's ISOCELL HMX and the Galaxy S20 Ultra's ISOCELL HM1, with both sensors having identical physical specifications.