Sizing is about 1/2 size larger than most Japanese labels that are similiar. I am 6' and 162 lbs and can comfortably wear a size medium. I am usually a large or size 3 in other Japanese labels. All of the Sunny Sports Button Downs we carry are made in Japan and I believe Okayama. They offer sizes from Small through XXL. Since this was our first season and we did not know the sizing, we only ordered through size large. If there is demand for XL and XXL, please let us know. We have already sold a number of these shirts and I have asked about restocking. I may be able to get XL and XXL this season.