Stone Island knitwear. I think it's about a size L. The tag says CP Company, so I think it's from the early days. Considering it's over 30 years old, the condition isn't too bad, but the hem is slightly unraveled, and when I got it, both armpits were torn, so I had them repaired at a local tailor. I've replaced the green-bordered patch with a regular one because I lost the original. Please refrain from purchasing if you are sensitive to these details.