This style runs 1/2 - 1 size large for me. I'm very petite (5"2, 97 pounds) and usually wear size 24 for most other designer jeans (DL1961, AG, Black Orchid) but have to take 23 for this like my other Siwy jeans for a snug fit. The thigh and leg fit perfectly, although the waist and hip area fit a little tight but I'm anticipating it to stretch so I don't really mind. The dark grey color has slight green undertone in person (unlike the cool grey in the photos) but then again I don't really mind as I feel that makes the grey easier to match with warmer colors. Love the low rise of only 7" for size 23!