Tag in jacket says 54 but it has been altered to a 48.

Mannequin is a size 38 chest.

This is a medium weight jacket.

LINING (Full or Partial): full
Rear vents: 2

Measurements
Chest: (Across chest armpit to armpit, doubled): 50"
Overall Length: 34"
Sleeves (From outer edge of shoulder to outer cuff of sleeve): 25"
Shoulders (Across top of Shoulders): 19"