Installation note: When measuring to pick out your motor with this adapter on your BB shell please measure the total width including any width the adapter adds. So if it adds a couple millimeters on each side take that into account. For a BBSHD this is less of an issue than BBS02.
Dimensions: This should slide into the frame itself for the most part so the adapter should not add significant width to the BB shell. The adapter itself is ~10mm (all of which goes into the shell) with a ~1mm lip.