Do you want to try this sizing link?
 

http://www.bikefitting.com/

If you click English then frame size then frame size again then enter your inseam. (You can use a fake email address.) Does it correspond to what you like for a size?

Not for me. Maybe for modern frames, which seem to be much smaller than the ones I grew up with in the 1980s. This site suggests a frame fully four cm. smaller than the ones I raced on, based on the Renault/Gitane/Guimard/LeMond formula.

Inseam isn't a very useful measurement to judge the size of a bicycle by. Personally, the top tube measurement is more important. Get it right first, then look at the height of the bicycle.

Probably coincidence, but it seems right on the money for me for a bike with a horizontal top tube. Of course today most bikes have a slanted top tube, so this might be more applicable to the 1990s and earlier.