“Go up a size if you're a big lad. I'm a bodybuilder and on the sizing chart 4XL should have been OK, yet it was too tight across the chest and shoulders and short in the arms.. without layers underneath.
Returned for refund then bought 5XL (shame I simply couldn't exchange) which is much better.. a little short in the arm still but more giving across my shoulders and chest with base layers. I haven't tried a winter jumper yet! The coat is good quality and should last, time will tell.”