I bought this cattleya several years ago at a big box store. It has bloomed for me twice now and this is the first year it has two blooms on it. I don't know the name or the cross as I lost the tag.
I didn't get to measure the first bloom, but as you can see the second one ( which I am sure is smaller then the first one) is 5 1/2" wide. I would assume the first bloom was around 6 1/2" wide.