• length
  • width
  length
  size (US) in cm

infant

  newborn 3 1/4 8.2
  0-3 months 3 1/2 9.0
  3-6 months 3 7/8 9.9
  6-9 months 4 1/4 10.7
  9-12 months 4 5/8 11.6

little kid

  3.5 4 3/8 11.2
  4 4 5/8 11.6
  4.5 4 3/4 12.0
  5 4 7/8 12.4
  5.5 5 1/8 12.9
  6 5 1/4 13.3
  6.5 5 3/8 13.7
  7 5 5/8 14.1
  7.5 5 3/4 14.6
  8 5 7/8 15.0
  8.5 6 1/8 15.4
  9 6 1/4 15.8
  9.5 6 3/8 16.3
  10 6 5/8 16.7

big kid

  10.5 6 3/4 17.1
  11 6 7/8 17.5
  11.5 7 1/8 18.0
  12 7 1/4 18.4
  12.5 7 3/8 18.8
  13 7 5/8 19.2
  13.5 7 3/4 19.7
  1 7 7/8 20.1
  1.5 8 1/8 20.5
  2 8 1/4 20.9
  2.5 8 3/8 21.3
  3 8 5/8 21.8
  3.5 8 3/4 22.2
  4 8 7/8 22.6
  4.5 9 1/8 23.1
  5 9 1/4 23.5
  5.5 9 3/8 23.9
  6 9 5/8 24.3
  6.5 9 3/4 24.8
  7 9 7/8 25.2