The light-green ruched side dress has a straight neckline, thin shoulder straps, a tied open back and an uneven hem. Its side zipper closes the dress, while the shoulder strings and back ties position the straps. Those parts answer different fit questions. Choose among S, M and L by checking the closed body first, then work out how you would tie the back.

Decide whether the zipped body has room

The source chart gives bust/waist/hip in inches: S 27.6/26.4/35.8, M 28.5/28.0/37.4 and L 29.4/29.5/39.0. The changes are not uniform: bust rises less than one inch per step, while waist and hip rise more. Compare all three points with a fitted dress you already wear, measuring at corresponding places. The source does not say whether the figures are body dimensions or finished-garment dimensions, nor how much ease the lining and chiffon-blend outer fabric allow. Ask for the chart convention if you need a precise ease calculation. The back ties cannot add width to the closed side zipper.

Treat the two length numbers as a question to resolve

The listing calls the hem asymmetric and prints dress length as S 20–36 in, M 20–37 in and L 20.5–37 in. The gallery shows one side ending higher than the other, but the chart does not label the points at which each end of the range was measured. If coverage matters, mark the shorter and longer lengths on a dress you own from a consistent starting point, then ask which edge each listed number describes. Sizing up increases the listed longer figure by one inch from S to M, while the shorter figure stays at 20 in; it is not a reliable way to make every part of the hem longer.

Use the straps after checking the base fit

The description lists adjustable strings over the shoulders and a crisscross tie at the open back. These may help position the neckline and back opening, but no strap length, tie range or back-coverage measurement is given. Before ordering, decide whether your intended undergarment can work with the open back shown in the gallery. The light-green color is the only listed color selector. A simple bag and shoes are styling options, not items included with the dress. For help distinguishing body measurements from a garment chart, read the measurement guide.