This openwork V-neck cardigan lists the same 20-inch sleeve at S, M and L even as bust rises 45, 47 and 48 inches. XL changes sleeve to 21 inches and bust to 50. If you are sizing up for chest room, cuff reach may barely change.

Test it as an outer layer

Use a cardigan you wear over a typical tee. Measure its bust and neck-to-cuff reach, since a dropped shoulder shifts where a conventional sleeve measurement begins. Compare body length too: S is 23 inches, M 24, and L and XL both 25. A larger size can change the front drape while leaving the hem or sleeve almost fixed. Request a photo with the selected cardigan over a plain shirt so the V opening and openwork are visible.

The listing says both “openwork” and “Sheer: No”. That general sheer flag does not map each open stitch or guarantee coverage without an underlayer. Choose a base top whose neckline works with the V, and check the chosen colour under ordinary light. The 85% acrylic/15% polyester blend and “slightly stretchy” label give no measured extension, recovery or button details; do not infer a fastening system from the word cardigan.