Therefore the dimension of the board are important. This information is missing
from the mechanical drawing in the ADIS1620x_PCB datasheet?
We don't have any better drawing for PCB dimensions. I have measured the
overall board dimensions 31mm x 33mm. The four mounting holes on the PCB are
suitable for 2mm screws (M2). I have added this information to the datasheet
drawing and attached it to this FAQ. In future revisions of the datasheet we
will add this information to the datasheet drawing.