Olivia Rubin White Linen Rainbow Button Mini Dress Size US 0 Olivia Rubin white 100% cotton mini dress with the most charming rainbow pastel fabric covered buttons down the center front — pink, blue, yellow, and mint alternating all the way down. V-neck, puff sleeves with elasticated cuffs, zip back, fitted bodice with flared skirt. Flat lay waist approx 13”, length approx 37”. UK 4 / US 0. Good condition. Missing a button! Olivia Rubin, designer dress, rainbow button dress, white mini dress, cottagecore, wedding guest, summer dress, puff sleeve, London designer, going out.