Ordered XXXL, fits well. Nice jacket. Small point to note is that the “grey” is more blue. This doesn’t affect the purchase for me.
I appreciate that the seller states that these jackets are Asian sizes however, I ordered the 2XL and it is still slightly snug. Ordinarily I would wear a UK Large. If you order one of these jackets please consider this. Apart from the sizing I have no issues with this well manufactured jacket.