This plastic knife guard fits small paring and petty knives. Measures 8.5" long or about 215mm. Also measures 1" wide. It's open on one side so you can easily slide the knife into the guard and it will hold it. This plastic is hard, food safe and durable. Great for taking your knives to work or protecting them when putting them in your drawer for quick and inexpensive storage. They're also dishwasher safe.