The BODUM CHEF Knife Line consists of 24 different knives, a sharpening steel and a carving fork. They are handmade of the finest Japanese blade steel: Molybedenum/Vanadium stainless steel (AUS6M), hardened to HRC 57° or 420J2 stainless steel, hardened to HRC 50°. The handle is cast in stainless chrome steel 18/8 and has a special die-cast texture for a non-slip effect. Even the BODUM CHEF Knives should be sharpened regularly: hold your knife at an acute angle towards your sharpening steel, then sharpen both sides of the blade alternately with consistent pressure. By the way: serrated knives don’t need re-sharpening.Even the BODUM CHEF Knives should be sharpened regularly: hold your knife at an acute angle towards your sharpening steel, then sharpen both sides of the blade alternately with consistent pressure. By the way: serrated knives dont need re-sharpening.About the care of the BODUM CHEF Knives: good knives dont belong in the dishwasher. Finest grinding particles in the dish soap affect the blade and make it edgeless. Good knives should be cleaned with a damp towel and then wiped dry. With the proper care the BODUM CHEF Knives will last a lifetime.Size: 24 cm, 9.5 inches