This dress runs almost exactly one size small. I always wear a 4 in dresses and the 6 (the 38) fit absolutely perfect and I didn't have a centimeter to spare! I am a small 34B in the chest and there was no room to be bigger than that! I can't imagine anyone with a larger chest being able to fit into this dress. That being said, I was so thrilled that it fit because it was extremely flattering and the length was perfect. I am 5'4 and it was a great length just to my knees. The only negative was that the dress arrived VERY wrinkled and had a rip along the seam of the zipper. I had to take it to my drycleaners and they mended the zipper and pressed it and it looked like a new dress when I picked it up. It needed a little more TLC to get it up to wearable condition. All in all, I was so happy and comfortable in the dress and got tons of compliments!