What is a requirement for a chalef according to kosher laws?

In kosher dietary laws, the requirement for a chalef, which is a special type of knife used for ritual slaughter (shechita), is that it must be double the length of the animal's neck. This ensures that the slaughter can be performed swiftly and humanely, allowing for an effective cut that will sever the necessary vessels in one clean motion. The requirement for the chalef to be of adequate length is crucial for compliance with these laws, as an improper cut could result in the meat being deemed non-kosher. The focus on size helps to uphold the specific traditions and standards of animal welfare in Jewish dietary practices.