Mil is wearing the relaxed fit wide legged elasticated trousers in size 3 (and also wears the size 3 in the classic high waisted trews) 

Height: 5'11
Chest: 40"
Waist at bellybutton: 37" ( But usually wears size 34" trousers)
Hips around bottom: 41"

Mil wears classic men's MEDIUM

NB our relaxed fit trousers are longer in length than our classic high waisted trousers