Is the Sun shrinking in size?

In fact, the Sun's radius is slowly increasing in size as it ages, but this rate is unmeasurable due to the large number of effects that have to be properly accounted for. During the next five billion years or so, it will roughly double in size as it approaches its red giant phase.

Humans have been seeing total solar eclipses for thousands of years, so this means that the sun cannot be shrinking or growing faster than a few meters per year.