I purchased this a size up from my typical size so it would have a loose fit, and it's perfect.
I typically wear an XL, I purchased an XXL. My measurements are 36DD, 31, 38. It has a perfect length to it, can be worn with leggings or jeans since it runs longer on me. The back is about 3 inches longer than the front. The sleeves have a great length to them, a little long on me, but that is typical as my arms are short. They have a loose fit to them, which is also excellent, as I have larger upper arms.
It's not a heavy fabric, but it is not thin. I actually dislike the bulk that winter requires, this is warm without adding the extra weight. Comfortable to wear under your winter coat without making it snug. The collar is loose, it really has no right why to wear it, just let it fall as it wants.
I've received more compliments on this than any sweater I've worn this season. I think the color combination makes it stand out and look unique. Definitely in my top 3 favorites.