Great Jersey! Light weight fits well. Very versatile. I am 5’8” and weigh 135.lbs. I ordered the medium because I have wide shoulders and long arms. The medium was roomy through the torso but fit well in the shoulders and arms.
The item fit perfectly in a size small. For reference, I have long arms and a fairly muscular upper back and arms from climbing for many years. I tend to be between sizes and clothing feels restrictive at my widest points (shoulders & forearms) but then are loose in other areas. I was debating XS or S based on the size guide and very happy I chose a small. Overall, the small fits tightly, has appropriate arm length, pockets do not sag, and it is long enough in the torso. I was a little surprised the Lead color was more of a pale blue. I was expecting more of a gray color, but I'm not too picky about color. The fabric feels great in hot weather (I live in Tucson, AZ) and is excellent sun protection.
The jersey is great of a comfortable and stretchy fabric. However the cuff was too tight which makes the jersey not comfortably wearable. I’m 5’9”, 140 lbs, size 29 waist.
Love love this jersey. Warm but cool if you know what I mean. Feels like a second skin. Could be a bit longer imo.