I purchased these from an authorized online retailer about 5 years ago. The blades have been sharpened repeatedly, so the blade lengths are shorter than the product information below. They are made of stainless steel and carbon steel, so there is some rust, but they have been sharpened and are ready to use. ■Product Information (when new) 【Material】Blade: Stainless steel & SLD steel, fully 3-layer / Handle: Carbonized wood (chestnut) ○ Santoku Knife 【Weight】Approx. 135g 【Notes】Comes in a paper box 【Size】Total length: 30cm, Blade length: 17cm, Handle circumference (max): approx. 8cm, Package: 8.6 x 2.6 x 34.7cm ○ Petty Knife 【Weight】Approx. 50g 【Notes】Comes in a paper box 【Size】Total length: 22.8cm, Blade length: 12.5cm, Handle circumference (max): approx. 6.5cm, Package: 8.6 x 2.6 x 27.8cm