What does the number 7 on a baseball bat mean?

Answer 1

If the bat reads number 7 on the knob it is an inch mark which would indicate the bat being a 27 inch bat.

Inch Mark is a term used with Baseball bats referring to the number stamped into the knob of the bat indicating the length on store model bats. Model number is not an inch mark. This is placed there to help the buyer identify the size of the bat.