Formal Hunter Green Dress - Size 9 (Fits more like a 6 or 8)

Formal Hunter Green Dress worn one time. Free of any spots and tears, in perfect condition. Fabric is kind of a stiffer shimmery fabric, dry clean only. Regarding size: It is labeled size 9/10. I tried it on and I think it fits more like a 6 or 8. I am busty and about a size 10 and I could not zip it up (as shown in photos) by about 3 inches. The waist measures 28" around. Bust area measures 32" around. Dress is 51 inches long from shoulder to bottom. Please be sure about these measurements fitting since this is non-returnable. If anything, let the dress perhaps be a little big and you can have alterations.