A plain sleeveless dress uses large quiet surfaces here. The deep V-neck leads towards a broad horizontal waist section. A full long skirt opens below with vertical folds. The front arrangement remains largely without prominent pattern. A small pale intermediate area appears at the deepest neckline point. Relaxed arms beside the body make the connection between upper section, waist and broader lower form easy to see, supplying several clear lines on the same quiet background.
Waist width is particularly useful for a comparison. Do you want a defined finish like this or a finer line between bodice and skirt? Try both on actual garments with similar colour and the same important companions. This keeps the decision from being obscured by another pattern surface or changed accessories, making the difference in proportion easier to identify.
Have the real neckline arrangement and inner layers shown. The quiet surface explains neither a particular fibre nor support. Inspect side and back afterwards and move in your shoes. Add jewellery or veil individually once the base shape is clear. You can choose a full outline while retaining a plain surface; less decoration does not require a close-fitting skirt.