Divide 1 to 54 into 9 scales

Divide the numbers from 1-54 into 9 scales, with each scale representing the following numerical intervals:

Size 1st: 1 - 6

Size 2nd: 7 - 12

Size 3rd: 13 - 18

Size 4th: 19 - 24

Size 5th: 25 - 30

Size 6th: 31 - 36

Size 7th: 37 - 42

Size 8th: 43 - 48

Size 9th: 49 - 54