An emergency and pause button which fit on 12x12mm buttons like these:
https://www.amazon.com/TWTADE-Momentary-Tactile-Button-12x12x12mm/dp/B07CG7VTGD/ref=sr_1_1?crid=3JZ6GQ5O6H1L1&keywords=12x12%2Bbutton%2Belectronics&qid=1688304195&sprefix=12x12%2Bbutton%2Belectronics%2Caps%2C164&sr=8-1&th=1