M59 shirt new/unused

The classic Swedish M59 cotton shirt that even mosquitoes struggle to bite through.
Excellent quality, completely unused/new shirts available in three sizes: 37 (Small), 39 (Medium), 41 (Medium/Large).
I’ve tried this shirt myself to get a sense of the sizing. I weigh 95 kg and am 184 cm tall, usually wear size 43, but this size 41 fits well, though it can be a bit tight across the back.
Keep in mind that these shirts shrink slightly when washed.