Ben is 6ft4 wears size L.
Sizing runs larger, for an oversized fit.
Adults Tee Garment Measurements
BODY LENGTH = XS: 70cm, S: 73cm, M: 76cm, L: 79cm, XL: 82cm
CHEST WIDTH = XS: 57cm, S:60 cm, M: 62cm, L: 65cm, XL: 67cm
SLEEVE LENGTH = XS: 19cm, S: 20cm, M: 21cm, L: 22cm, XL: 23cm