I wish a had ordered a medium because the small I got is a bit snug, but I’m still very fond of it and love the color. Fortunately, I’m lanky so it’s really no big deal. Here are the measurements I’ve taken of the small for anyone on the fence. I know I would’ve appreciated it beforehand. Chest, from underarm to underarm, is 18” and the length, from the back of the neck to the bottom, is 26”.