Billini Heels Universal Store Billini Shoes Heels, Boots, Sandals Universal Store Billini Heels Universal Store Billini Heels Universal Store. Non leather upper, lining and sole. Square toe. Mid block heel. Open back. Crossover straps. Heel height; 8cm. Size 8 is an EU39. This shoe runs true to size. Fancy vibes only with the Otilla Heels. Featuring a square toe with a strappy detail. Style yours with your next night out outfit!