Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE table_24463 ( "Category" text, "Sub-category" text, "Cab size" text, "Drive wheels" text, "Capacity (litres)" text )

### Question ###
Name the number of cab size for 4 medium tanker

### Accurate SQL ###

SELECT COUNT("Cab size") FROM table_24463 WHERE "Category" = '4 Medium tanker'