Fine straps sit above a shiny pink dress in this close front view. The upper edge is comparatively straight, while gathered areas run along the close-fitting body. The skirt is short, and the framing does not show the full back construction. The visible sheen and folds describe the surface appearance; they do not establish the fibre or the amount of stretch in the actual garment.
If a fine strap needs shortening, watch the front edge, underarm opening and waist together while standing and seated. Ask the fitter to demonstrate the proposed change before you agree. Raising the neckline alone is not the whole result if another area becomes less comfortable. The photograph cannot confirm that these straps are adjustable or that a length change is possible.
Try your intended bag and check whether a shoulder strap competes with the fine dress line. A hand-held option may produce a different arrangement that you prefer. Compare the dress after sitting without first smoothing every fold into place. This helps distinguish the surface you enjoy in the photograph from the ordinary appearance and handling you want during the evening.