We get these in our yard every summer. I like watching them grow because they get so huge. They can get to be a good 4" with their leg span. They're pretty amazing looking.
Actually, when we first were looking for homes here, it was October. We looked at one new house where a writer spider had made a web across the front dining room window and then planted itself right in the center. I had never seen one before and I honestly thought it was a Halloween decoration. It wasn't until the realtor nervously said "Uh, I guess we need to get rid of that" that I realized it was real - it was huge! But I enjoyed examining it from the inside of the house through the glass