M&S Collection Women Midi Dress Square Neck size 20 Long Shirred Bodice Blue Mix

Elasticated sleeve cuffs

Measurements
Relaxed chest 36 inch  (around armpits)
Relaxed Waist  32 inch
Back length 53 inch (from shoulder)
Sleeve length 22 inch

Material
100% viscose
Machine washable

Also on j-the-best & c-the-best