Temp sensor size?

Heres an elec from autometer. Similar to what we put in, a matching triple gauge set from Autometer. Mechanical oil psi with the "dont use that!!" tubing and no leaks 4 years of use. Voltmeter and electrical coolant with factory sensor.
Auto Meter 4337: Ultra-Lite Water Temperature Gauge 2-1/16" electrical | JEGS