I have a queen or a king size blanket, so it’s really really big I was wondering if they have big washers and dryer’s there?

Yes

Yes they do.

Yes, you could wash something huge

Yes they definitely have big enough ones that would fit your blanket

Yes, they do have washers and dryers that will accommodate large blankets such as these. They have small load top loaders, "mega load" size front loaders, and "giant load" sized front loaders. I thought they had 2 more machines that were even bigger than the giant loaders, but I may be getting mixed up with another place. I would suggest using the giant loader for your blanket. They work great on mine.