Rubbish Open Back Stripe Dress XS

Rubbish Backless Stripe Dress. Elastic Waist. Open Back. Red & Navy Multi colored. Gently used - No stains - Worn twice. It looks like the elastic has slightly flipped over. See last pic - look at elastic waistband towards the left Women's Size XS Approx. Measurements - Flat & Unstretched Armpit to armpit 15" Waist 11" Length 31.5-32.5" Feel free to ask questions. I am looking for this dress in a Medium - if you have it, tag me please!