I wear size M and the M fits well on me. It is a Greek product, but it has some issues, the elastic bands on the neckline and waist do not seem to be of good quality. Another thing that surprised me is that the fabric easily gets wrinkled, even from the jacket that will be worn on top...
Do not expect to see the quality of a 20 or 30 euro product with just 10. However, for its price, it is good

Awesome value for money. The quality and stitching are amazing and well-crafted. It has a regular fit while the sleeves are not oversized as usual in larger sizes.