The square-collar floral chiffon dress is listed in Black and Apricot, sizes S–XL. A square neckline draws attention to where the shoulder edge sits, but the source chart does not give neckline width or depth. Use its shoulder and sleeve rows to narrow the size question, then ask for the neckline details that the chart leaves out.

Does the bust number tell me how the square collar will sit?

No. The chart gives S/M/L/XL bust as 86/90/94/98 cm and shoulder as 36/37/38/39 cm. Each size adds 4 cm at the bust but only 1 cm at the shoulder. A larger bust row therefore does not tell you how far the collar corners sit from your neck or whether a strap would show. Compare a dress you already own at both bust and shoulder. If neckline coverage matters, request a flat measurement between the inner collar corners and a vertical neckline depth, measured from named points on the actual garment.

Which row should I compare if I am between sizes?

Use more than one dimension. The listed waist is 68/72/76/80 cm; sleeve 28/29/30/31 cm; and length 74/75/76/77 cm from S through XL. For a hypothetical example, suppose your reference dress measures 92 cm at bust and 74 cm at waist using the same method. M is 2 cm smaller at both points; L is 2 cm larger. L also lists a 38 cm shoulder versus M’s 37 cm. These numbers identify what to measure next, not a guaranteed fit. The source allows a 2–3 cm manual measurement difference and does not define whether the chart describes finished garments or body measurements.

Can I use the sleeve and length values to plan coverage?

Only as a starting comparison. A one-size increase adds 1 cm to listed sleeve length and 1 cm to listed dress length. Check the sleeve and hem of your reference dress from consistent starting points, then ask which points were used here. The chart supplies no sleeve-opening width, so a sleeve that is long enough may still feel different around the arm. It also supplies no skirt sweep or lining detail. The word “chiffon” in the name is not a verified fiber label or proof of opacity; ask for the composition and lining information if either affects your choice.

When should I decide between Black and Apricot?

After the size and coverage questions are clear, compare the actual option photos for the floral pattern and color placement. Screens and lighting may change the shade you see. The source does not document care instructions or stretch, so do not infer them from either photo. Request those facts before buying if they determine how you would wear or maintain the dress.