This is a 57cm to 58cm I have yet to contact the seller due to the fact that when and if I do I want to come across as a committed buyer and not a tire kicker.

The Allez Epic was a 56cm. I had some reach issues at first when riding on the tops of the drop bars. But after Adjusting the spacers and angling the drops more upward it became much more manageable.

My Height is 5'10.5"
I have not been fitted but should invest all of an hour to measure myself for what its worth.

There are some 59cm Klein Quantum Race frames on eBay right now in the notorious awesome blue teal paint. Obviously with a 59cm I'd need to be measured at a comfortable 58cm as 59cm is pretty much a 60cm for my height.