Its largest mall store in the world, in Westfield Garden State Plaza, Paramus, N.J., was opened last Friday. The two-level, 43,000-sq.-ft. store will serve as the prototype for the Japanese retailer’s U.S. mall expansion. The new Uniqlo replaces an Old Navy store and has its own separate entrance to the parking lot as well as a traditional mall entrance. A large LCD monitor display at the mall entrance will feature special interactive games and other content to engage shoppers.