tool box SIZE 11" ,13" ,15",17",19",21" tool boxSIZE 11" ,13" ,15",17",19",21"you can choice the size for this desigeabout the packing,you can put 11" in the 15",and put 15" in the 19"or put 13" in the 17",and put 17" in the 21" tool box tool case toolbox