Double Yolk

So yesterday I was bringing in the eggs and I noticed one was rather large. So far they have been in the small to medium range but this one was more like the extra large ones you get at the store. I had a feeling that it was a double yolker but wasn't sure. I think this is actually my second one because a while back I was making something and couldn't tell if it was two yolks or if I messed it up cracking the egg. Anyway I cracked this one onto a glass so I would be sure.