[Closed] Darkside Sizing

Hi,
Ive rode mtb's for years and fancy buying a road bike for a change and to keep me on the bike when winter comes (training iron).
looking for anyone who has a link or infomation on road bike sizing or could recomend a good web site for the novice roadie.
I know i should get properly fitted etc but dont want to turn up to a shop and look daft as i know nothing about fit and bike specs for road kit.
Budget around a grand would spend a bit more for if i had too

many thanks