Classic Sweetheart Shaped Corset top is also known as over bust corsets. These all feature light-weight silhouette boning. Corset has adjustable lace-up ribbon in the back for a proper fit. For heavier boned corsets, please see Steel Boned Corsets. All corsets fit smaller than normal US sizing. Front steel busks closure from Bonitaz Corsets Royal Blue 3X/4X European size. Please note Bonitaz Corset sizes fit smaller than typical US sizes. It is important for customers choose mainly based on their waist size. Waist 34 inches - 38 inches. Bust 42 inches - 46 inches. United States dress sizes 12-16.