Australian sisters Nicky and Simone Zimmermann have come a long way since the 1991 launch of their eponymous fashion label. What started as a small operation in Sydney has expanded into an internationally renowned brand, with dozens of stores worldwide. The line’s feminine silhouettes, which evoke visions of summering on the French Riviera and winter trips to St. Barth’s, are adored by celebrities and are some of the best-selling designs on online retailer Net-a-Porter. Based in Sydney, Nicky an...