Kasumi produce their standard chef knife in 20cm and 24cm sizes. The SM-88020 is the 20cm version and is the lead knife in the series. As a chef's knife it can be used for a variety of kitchen tasks, such as slicing, cutting and chopping and is very much the go to knife in the series. If you are looking for one good Kasumi knife, go for the 20cm chef's knife. The larger size the SM-88024 is 24cm is more suitable for professional chefs and is quite big.