The DS64's approximate size:
12cm (length) x 8.8cm (width) x 3.5cm (height)
4.75" (length) x 3.5" (width) x 1.4" (height)
The front edge of the DS64 needs clearance for wires to be attached.
The back edge has two LocoNet connectors and a barrel style power supply connector.
The back edge and left end have cooling slots which must remain clear.
The case has three holes which can be used for mounting screws. (#6 5/8" or longer screws can be used)