It's thin but doesn't feel constricting, stretches well, and is warm. I received this as a gift, so I don't know the brand, but it's made in Japan and feels good against the skin. I have sensitive skin, and it's comfortable to wear. I've worn it about 10 times. It's labeled L~LL, but I think it fits a free size, so I've listed the size as free. The sleeves might be long for someone who wears a size S. It's made of a soft material, so you can fold it over or scrunch it up. Length: 53 cm Sleeve length: 60 cm But it stretches. Width: 26 cm, but stretches to 40 cm.