I have a 54 bk and the stand over is high I don't have the measurement in front of me but it is tall like a 56.
I also think the top tube is short, I felt a bit too close until I put on a 120 stem now its tight...in the cool kind of way.
Im 6' have a 34" inseam and the 54 is perfect for me.
Just dont get a pink one...b/c black is the new pink that was the new black