For the black floral button-down longline cardigan, a size decision needs more than the bust figure. Its buttons, shoulder position and hem can each change how it works over a shirt, trousers or dress. The selector offers S–XL. A model description on the page mentions 1X, which is not among those selectable sizes, so it should not be used as a size recommendation.

Anchor one: the button line

The listed bust values are 39.8 in for S, 41.3 for M, 43.7 for L and 46 for XL. Choose a buttoned cardigan you already wear over your intended base layer and compare its closed bust using the same measuring convention, if the seller can confirm it. Ask for a straight-on photo of the selected size with the buttons fastened. The listing does not show button spacing as a measurement, and a bust number alone cannot tell whether the front pulls between buttons.

Anchor two: shoulder and sleeve together

Shoulder entries rise from 20.3 to 23.4 in across S–XL, while sleeves rise from 20.7 to 21.5 in. The shoulder changes by 3.1 in but sleeve by only 0.8 in. Compare both against the reference cardigan rather than interpreting the sleeve number as wrist reach on its own. Confirm whether the shoulder is measured straight across and where the sleeve tape begins.

Anchor three: hem and floral placement

Lengths are 31.2, 31.6, 32.2 and 32.8 in from S through XL. Mark the likely hem against the trousers or dress you plan to wear. A difference of 1.6 in separates the chart endpoints, but the starting point of the length measurement is not specified. Ask for a full-length front photo if a particular flower placement matters. The listed fabric is 100% polyester with moderate stretch; neither fact establishes a tested stretch range or warmth level.