Zicome Collapsible Vegetable Steamer Basket, Seafood Steamer, Food Steamer - 7.5 Inch to 12 Inch - Stainless Steel Self-adjusting sides to fit most pans, suitable for use with both steel pans and non-stick cookware. 7.5" in diameter when closed,12" in diameter when fully open,large capacity when fully open, but folds neatly away for storage. Including 4 removable rings,footed to keep food above boiling water. Steam Foods preserves flavor and nutrients. Fold compactly for easy storage.Dishwasher Safe.