Chiffon plus size formal or wedding dress cream

Dress is a cream champagne color and in great overall condition. There is some pulled threads on one breast as seen in the pictures. The dress has a hidden zip in the back and faux buttons up the zip. I have included the size chart for this company and based on that I feel this dress is probably a size 20 even though the tag says 40. The company to my knowledge doesn’t make dressing past the size on this size chart.