Shackleton jackets are sized as follows

  s m l xl
chest (inches) 38 42 44 48
chest (cm) 96 107 112 119 

Shackleton knitwear is sized as follows

  xs s m l xl
chest (inches) 35.5 38 41 44 46.5
chest (cm) 90 97 104 111 118

Shackleton socks are sized as follows

Socks s/m  m/l
uk 4-7 uk 8-12