While the city's rich and famous seem to buy evening gowns as often as they do shoes, the rest of us may only need one once in a blue moon. For such a purchase, one option is Opus 1, in Causeway Bay. This shop sells dresses created by in-house designers, as well as some sourced from Europe. Gowns cost from $3,000 to $7,000. Opus 1 also stocks a range of high-end jewellery, in case customers feel the need to purchase some bling to go with their frock. Much of the jewellery is the work of in-house designers, while some pieces have been imported from Korea and India. The store has a full-time tailor, with more than 20 years experience, should you need any alterations made to your dress. Minor alterations usually take about a week; more extensive changes may require up to a month. Opus 1 is open from 10am to 7pm, Monday to Saturday. It is located at 11/F, Matheson Centre, 3 Matheson Street, Causeway Bay, tel: 3591 9834.