Park & Fifth Mackenzie Mini Dress, size small. Worn once for my rehearsal dinner and it was PERFECTION! I got so many compliments on it. I am 5'5 and 130lbs. I consider myself a TTS medium. I originally ordered a medium, but it was huge on my chest area, so I returned and got a small. I've heard others have had the same issue, so I recommend sizing down. The small should be perfect for you if you are usually a medium!