There are a few different factors to consider when choosing a knife for whittling. The first is the blade type. A straight blade is going to be the best option for most people, as it’s easier to control and make precise cuts with. However, if you’re more experienced with whittling, or you want to try doing more detailed work, then a curved blade might be a better option for you.
The second factor is the size of the knife. Again, this is mostly about personal preference and what feels comfortable for you to hold and use. That said, a smaller knife is going to be easier to control than a larger one, so if you’re just starting out it might be worth getting something on the smaller side.
Finally, you need to think about the material of the knife. Most knives used for whittling are made from high carbon steel, as this provides a good balance between hardness and durability. However, some people prefer stainless steel knives as they’re less likely to rust. Ultimately it’s up to you which material you choose – just make sure that whatever knife you go for feels comfortable in your hand and is easy for you to use.