This 4 1/2" LamsonSharp KnifeSafe holds 2 1/2" to 4 1/2" knives. We have tested all four sizes of the KnifeSafe with several of our cutlery lines, including our Global, Henckels, Wusthof, and Kyocera knives and each related size fit the knives perfectly. The KnifeSafe is an inexpensive investment that will not only protect your cutlery during storage and travel but also will help protect from accidental injuries.