Beautiful dress, but it runs small. I purchased the Saga Denim Top in size 0 and the Esmeralda dress, also in size 0. The top fits beautifully and is quite comfortable. However, the dress was very tight around the waist. I would definitely recommend sizing up or going with your usual size from other brands.
I typically wear a size 2, but all my tops from L’AGENCE are XXS, and I wear a 25 in L’AGENCE denim. For reference, I’m 5'4", about 115–120 lbs, 32D, with a 26-inch waist. The dress looked very long on me (which I expected, since I’m not model height). It’s a beautiful piece overall, but unfortunately, it wasn’t the right fit for me. Hope this helps.