So I ordered this hoodie from CowCow in 3X and it feels about 2 sizes too small, more like a 1X. I encourage you to look at their size chart and take your measurements. A typical American 3X has a chest size around 50-52" - theirs is "46-49."
http://www.cowcow.com/women-pullover-hoodie_p93900734
Asking $40 with shipping included in that price.
Women's pullover hoodie
Women's pullover hoodie
Upon the Rainbow, my rainbow blog.