nytimes.com – Square Feet By ALEXANDRA STEVENSON HONG KONG — There are breathtaking views of Victoria Harbor from a 23rd-floor apartment that recently sold for $722,000 in the new Le Riviera building. The high-end German appliances and marble countertops evoke European luxury. In the entrance of the building, colorful wire mesh sculptures by Spanish artists hang from the ceiling. There is just one catch. The apartment is only 275 square feet, with a bedroom just large enough to accommodate a double bed.