So there weren't any product reviews to go by when i ordered the last small. i had no way of knowing if it ran big, small, or tts. i'm usually a med, but to my surprise the small worked due to the fluid pleating. it sits right on my natural waistline similar to the model and not too short in length (i'm 5'8"). i also like the med weight of the fabric it moves freely when you walk, but not too light. it is similar to a double weight georgette or crepe.