Measured dimensions are approx 12.6mm long, 5.8mm wide, and the block is 6.6mm high, holes in the side for screw mounting are 2mm diameter with 6.5mm pitch, three legs are 0.8mm on the longest diameter with 5.1mm pitch.
The short arm fully depressed is about flush with the end of the block.
The long arm fully depressed extends about 6.6mm past the end of the block.
The bump arm fully depressed extends about 5.1mm past the end of the block.
3 legs, the one nearest the switch nub end is common, the one in the middle is normally open, and the last one is normally closed.