Ceramic knife is made by zirconium oxide by high temperature, it is very sharp, hard and keeping to use. Blade Length:3",4",5",6",7" Size Length Width Thickness Total Length 3” 76.2mm 20mm 1.8mm 175mm 4”101.6mm 22mm 1.8mm 205mm 5” 127mm 33mm 1.9mm 245mm 6” 134mm 33mm 2.0mm 270mm 7” 178mm 34mm 2.0mm 290mm Blade Material:zirconium oxide Handle:ABS+TPR Packaging :neutral packing/PMMA REST,ODM OFFERD 1. Ceramic knife is made by zirconium oxide by high temperature it is very sharp, hard and keeping to use. 2. The density of the knife is very high, the food will not stick on the body of the knife, easy to clean and control the bacteria reproduce. 3. Will not rust because of this knife doesn’t contain iron or metal. 4. The ceramic knife is light and sharp, take care when using. 5. The using life of ceramic knife is 60 times than metal knifes.