Thanks for your comments everyone. The flowers are big for the size of the plant; but, they're not as big as you seem to think. It's a camera angle thing. The flowers on this one were facing nearly straight up; so, when I took the photo, the flowers ended up being in a much closer plane than the leaves below. Actually, the two big leaves at the top of the photo belong to this plant.
I'd guess the NS of each flower is 3" to 3 1/2". But, I can't measure them now. I sold the plant not long after taking the photo. In fact, that's why I took the photo. I was enjoying the plant so much that I didn't want to sell it; but, I can't keep everything; so, I took a photo of it a few minutes before a customer was about to arrive. Sure enough, once they saw it, they wanted it. I already have one of these that I call "mine" and this one in the photo was just one of the others that was supposed to be for sale. If "my" plant is always whichever plant is currently in bloom, that means I'll pretty much keep all of them....can't afford to do that! "My" plant of this clone is in sheath. I'll just have to wait for it to bloom in order to get my full enjoyment. In the meantime, I did get to enjoy this one for a few weeks before it caught the eye of another admirer and went to it's new home.