There is no individual unit in the Metric system that is near one inch in the English system, I'm afraid.
As far as I am aware, the second (measure of time) is the only unit common to the English and metric system.
English system is to measure the volume in gallons.
An inch is such a measure.
The metric system and English system are two "competing" systems of units of measure. The US is one of the few places on earth where the English system is still winning.
Seconds, as a measure of time.
Newtons in Metric, and Pounds in the English System.
Force is measured in newtons.
The centigrade temperature scale in the Metric system was renamed in honour of Charles Celsius.
Metric measure of volume in cubic meters and gallons used in the English system.