A cross-strap evening back is the main feature of this blue dress reference. Narrow lines cross a broad open area above the waist, with a long skirt falling below. A mirror adds a front reflection that includes a leg opening. The image helps compare front and back outlines, but neither the crossing sequence nor the reflection explains how the actual fastening works or establishes a pleating method.
Ask the provider to demonstrate opening and closing on the real model. Try your intended underwear, sit and lean slightly forward while checking coverage. Decide whether you can manage the arrangement yourself or whether help fits your plans. A beautifully arranged rear view cannot answer those practical handling questions.
For the skirt, request a clear relaxed full-length view in addition to this back-focused composition. Compare its ordinary fall with the narrower repeated lines you may want in a different pleated option. Keep the two decisions separate: an open back you enjoy and the fold treatment you are actually looking for. Both need to work in the complete garment you try.