I?m glad I ordered a size larger. I?m 5?8?, 145 lb and usually wear a men?s small. I ordered a men?s M and it fits perfectly! I love the slightly wider neck than most men?s sweaters. The price seemed a little high relative to the other alpaca sweaters I?ve bought but I love it so no regrets.
I never know whether an item's fit will mean that I need a medium or a large. The medium size in this sweater works for my 5'11", 170 pound frame. The colors are great, and I hope that it lasts a long time.