This was my first time using RTR so I was excited but a little nervous. Depending on fit, I can vary from sizes 4-8 in dresses. After reading the reviews for this dress, I was concerned about the fit but ordered the size 6. I would have ordered the size 8 for back up but the size was not available. The top part is fitted and it was a little tight but it worked. I would even say it helped me stand up straighter. The bottom part was nice and flowy but a little see through which I fixed it with a short slip and it looked fine. The length was perfect, I thought it would be a little short since I am 5'8" but I even wore 2' heels and it still touched the ground. The 6L would have been too long. I would highly recommend this dress. I felt beautiful all night!