The average lifespan of a retail mall design globally is about seven years, and probably shrinking. That means that shopping centers built before 2009 probably don‘t provide the amenities and shopping environment or international fashion brands younger, more affluent consumers are seeking. There are six factors that affect a mall‘s success: comfort, diversity, luxury, mall essence, entertainment and convenience. Retailers and experts say it‘s a combination of factors: location, the catchment area around it, the right retail and product mix, design and maintenance. And yes, size, some of them say, does matter.