I purchased a 3 Xlarge based on the reviews. The dress does run small so a 3x was perfectly fitted to my frame. The only issue is the neck part. It should have had a looser rounded collar. I can wear between a size 12 to 15, depending on where I buy/purchase outfits/dresses. This dress has NO stretch to it. For size reference, my waist is 36 and when I eat too much it goes to 41 inches and still fits in the dress. My booooty/hips area is 52 1/2 inches. My Thighs are 45 1/2 inches. I wear a size 13/14 at Old Navy in jeans. Bust is 40D but at Vics Secrets it’s a 38/40DD. I usually weigh 205 pounds but currently am at 218 pounds and I am 5’4 height. I always purchase Large to XLarge in tops at Fashionova. The dress fit exactly perfect. I usually buy a large to XL on Fashionova or I base what I buy in size to what everyone reviews. So I do appreciate all of the fantastic sizes posted. The dress goes to my knees but rides up. It’s not see-through as it has a sheer top layer.