Head Size For HeadSizeImporter

59604, -1, -2, -1 # Stevens
107941, 3, 3, 1 # Van De Beek

Neck Sizes

Martina = Neck Length -2/Neck Size +3
Gayle = Neck Length -4/Neck Size +3
Van de Beek = Neck Length -4/Neck Size +6
Stevens = Neck Length -2/Neck Size -1