Bigger than your mom's butt
In case you missed it,

. This is the biggest sun spot I've ever seen. Sadly it was all rain and nastiness here in Los Angeles durning the spot's appearance and I was never able to view it directly.*
* You can definately see large sunspots on the sun with your naked eye provided you use safe viewing techinques. I suggest a pair of #15 welder's goggles (or a #10 lens + the #4 that comes with the actual goggles, both of which you can pick up at Home Depot for ~$15). As always, check with your local scientist before following my advice.