I have zero to negative stand over on several of my bikes. Standover height is the most overused and least useful piece of information on bike sizing. Google top tube length sizing, and give us details on stem length (not height). Stem is usually marked with minimum insert line, don't raise above it. Many set their stems at this line.

+1 If you have another road bike you like the fit on, take some measurements and compare. I try to match them bike to bike, lots of adjustment methods out there.