I have two of these jerseys in different colors. They run small by general cycling clothes standards, but about normal for Castelli sizing standards. I really like the light, breathable material. The breeze seems to blow right through it, keeping me cool in the sweltering heat. The arms are suitably long and cover the upper arm completely (as they should). If you are looking for a lightweight, hot-weather jersey, this is a great choice.
Have two now, perfect fitment for me in size L, I'm 6' 160 comfy tight aero fitment around my skinny arms. Spacious pockets, plentiful color options to match up with your bike color.
After 2 rides and 2 washes the material stretched in the back lengthwise. It was already an inch longer than all my other jerseys on arrival and bought as size Small. My cell phone in the center pocket is hanging past top of saddle. Only wear it for short rides with minimal stuff in pockets.
The jersey appears to be well made, but it is a bit flimsy - which is to say a little baggy with not much material support. Overall, I should have passed on this one, which I got an a fairly decent sale.
Perfect fit and excelent quality.
5'9" 160 lbs medium fits perfect. Great fabric also.
Excellent fit. Comfortable, with excellent wicking properties on hot days. Also, good back pockets for storing items for the ride.
Clean look. Cooling mesh. Good sleeve length. Castelli keeps making great gear.