label           XS        S       M       L      XL      2XL     3XL     4XL
Chest girth     70       70      70      70      70      70      70      70
length          66       66      66      66      66      66      66      66
Sleeve length   62       62      62      62      62      62      62      62

SELECT
  label,
  VALUE AS XS,
  VALUE AS S,
  VALUE AS M,
  VALUE AS L,
  VALUE AS XL,
  VALUE AS 2XL,
  VALUE AS 3XL,
  VALUE AS 4XL
FROM
  test
GROUP BY
   label