how big are sunspots?

Sunspots are normally HUGE.

This picture shows a medium size sunspot,

which is roughly the size of the Earth.

Sometimes sunspots are big enough to be seen without a telescope. These are the only spots that were recorded in ancient times.

To be seen in this way a spot would have to be larger than about 50,000 km in diameter (4 times the size of the Earth).

Most so-called naked eye sunspots are actually groups of spots that just look like one large spot - like the group in this picture taken by Paul Brierley

Here is a huge sunspot group observed with the GREGOR solar telescope in the Canary Islands of Tenerife.