A shallower back edge with lowered shoulder bands creates the upper decision in this rear view. The edge curves gently beneath the exposed upper back. Short side bands sit below the shoulder tops. A closer long body line follows, widening farther down. The spread rear surface carries patterns and looks partly sheer. That lower effect need not automatically accompany your preference for the back opening; consider them as separate properties.
Describe the curve and band position in turn. Do you want both, or mainly the open rounded middle? For an actual offer, ask for a straight rear view together with matching sides and front. These allow you to assess how the rear line really connects with the upper arrangement at the front, rather than borrowing it from another example.
For an older candidate, add current condition photographs and measurements. Request a clear view of the desired upper edge and lower patterned border especially. A similar photographic effect cannot establish construction or an available alteration. If you want the back depth changed, discuss that specific garment before basing the purchase on the proposed result.