Workstation kitchen sinks are on kitchen designers "must have" list for new kitchens.  The built-in ledge allows accessories like cutting boards, colanders and drain mats to be at countertop height.  A dual tier workstation sink allows the functional accessories be stacked when you need them out of the way.  Most of the time, dual tiers are 42" and wider.  But Ruvati and Nantucket sinks offer dual tiers in 30", 32" and 33" widths.