Hey Guitar Jim . Welcome aboard . To my knowledge no such data base is available on the thouroughbreds. More to the point however, why do you enquire ? In over 30 years of horse racing I am yet to see any correlation of long term success being based soley on physical size. Distance horses by example are invariably lean and sallow looking whereas sprinters and milers are generally compact and muscled powerhouses. Anyway, look forward to hearing your reasoning and your being part of this forum long term.

John