The watercolor floral puff dress has an organza outer look, a lined tiered skirt, half-length puff sleeves and a concealed back zip. Its three size rows give a small, clear progression at the top: S lists 30 inches for chest and waist, M lists 31, and L lists 32. Every row lists the same 33-inch length. These numbers are a starting point for comparison, not a guarantee of room on the body.

Start at the empire seam, not the letter

An empire-waist dress is shaped above the natural waist, so the chart’s “waist” label needs clarification. The listing does not show where that 30–32-inch value was taken or whether it describes the finished garment or a suggested body measurement. If you own a similarly shaped dress, record its chest circumference and the circumference at its raised seam. Compare those with the listed row only after confirming that the points and measurement convention match. A natural-waist tape measure alone may answer the wrong question for this cut.

The back zip matters when trying to get the fitted upper section over the body: the opening cannot make the closed chest and seam larger. Ask for the flat measurements across the closed dress, plus the shoulder and sleeve opening, if either is usually your limiting point. The source gives no sleeve-opening figure, despite making the puff sleeve a prominent design feature.

Check the 33-inch hem independently

Changing from S to L changes the listed chest and waist by two inches in total, but it does not change the listed length. Find the shoulder-to-hem length on a short dress you already wear comfortably and compare it with 33 inches at the same starting point. Then check coverage while sitting as well as standing. If the existing dress is materially longer, choosing L here will not solve the length difference shown in this chart.

The product description confirms lining and a concealed back zip, but does not specify the lining’s cut, stretch or opacity. Confirm those details if they affect your decision. Once the top measurement point and hem are clear, choose S, M or L by the actual dress dimensions rather than by a usual letter size.