It's a size 8. I've also included a size chart from the Kenneth Winston website. There are no visible scuffs or marks. The dress has a beautiful lace and beaded detail at the back.
Women’s Kenneth Winston Bridal Wedding Gown Private Label By G Style 1730 Size 6
Kenneth Winston Private Lable by G Style 1900 Size 14 Ivory/Nude/Silver NWOT
KENNETH WINSTON Size 18 Bordeau Red Bridesmaid Prom Formal Dress
Stunning Kenneth Winston Ella Rosa Wedding Gown Size 16
Size 16 Kenneth Winston PRIVATE LABEL BY G BRIDAL DESIGN HOUSE GOWN $1472
Size 12 Kenneth Winston PRIVATE LABEL BY G BRIDAL DESIGN HOUSE GOWN