Editing Omron B2R series (section)

===Dimensions===
Total height from the PCB standoffs to the top of the slider is around 29 mm. The shell is stepped and appears to be designed for two different mounting plate thicknesses or different PCB-to-plate distances, by way of different size holes in the plate. The mounting hole should be around 15.3 mm square, and the PCB-to-plate distance of 14.2 mm. The switch appears to support a slightly larger hole of 17.6 by 15.3 mm; this is in fact a pair of ridges that retain the sealing bellows sometimes seen on these switches. The maximum width and depth of the switch (above the plate) is around 17.6 by 17.7 mm.

The magnet is 6.4 mm wide by 5.9 mm tall by 2.8 mm deep.