Based on Figure 11 in the original publication (scale bar = 10 cm):
![enter image description here](
The anteroposterior length of the skull should be about 16.3 cm. I just printed out the figure and did the conversion.
So check that your 3D printing software estimates a little over 16 cm for the length from brow ridge to occipital. The full reconstructed skull will be longer of course, but this should give you a concrete measurement to compare to.