The skull, which is 23cm long and more than 15cm wide, is substantially larger than a modern human’sLet's see now.
23cm = 230mm
There are 25.4mm in 1 inch
Length of skull in inches = 230mm/25.4mm = 9.06 inches... This basically correlates to an XL hat size.
This is just one specimen? If just one sample how do they know the sample is representative and not pathological? What if way way in the future some paleoanthropologist digs up the late Andre the Giant? Nice guy I hear but hardly representative !