Size 51. Nearly new/barely used. Probably 100 miles. My wife enjoys mtn biking more, so this beauty is just taking up space. She's 5'5", so /- a couple of inches should fit you. Specs:
Full carbon frame and fork (yep! full carbon).
Shimano 105 shifters, front & rear derailleur.
FSA Gossamer crank with BB30 bottom bracket.
Carbon seatpost.
Comfy San Marco saddle.

It's a great bike with relaxed geometry. It's clean and shiny and looking for a good home.