These switches are SPST NON-latching 39mm long including connectors, The button is 11mm square and it's surround is 15mm square.

Maimum panel thickness is 3.5mm or 4mm without the spring washer.

The minimum distance needed behind the switch measuring from the front of the front panel is 28mm.

Panel cut out is 12mm

Rated at 1A 250V AC.