I have found one advertised that states the boxed weight as 180 grams (approximately 6 ounces), which suggests it would be about the right weight and size for use as a corporal punishment implement.

In my studies of corporal punishment in South Korea, I was appalled to find that some teachers resorted to the use of baseball bats, pool cues and even golf clubs to hit their students. In a country where a huge range of implements designed for the purpose are on sale, I cannot imagine why anyone should feel the need to use something that risks causing injury.