Size is XL (Jp) and fits an AUS Medium like me perfectly, excellent overall build quality & being lightweight yet nice and warm that doesn't really get hot or uncomfortable to wear, print/design quality of Kotoko is sharp with nice colours that aren't too bright/saturated.
The inner cotton lining of both body & sleeves are of a unique pattern/design which is very comfortable against the skin and wouldn't ever find irritable.
Overall a great Hoodie to wear all round/anywhere, Definitely worth it if your thinking about getting one.