Products runs very small

I usually can do a medium or large but I do have tummy an this was not fitting for me. For reference I’m (5ft, 166lbs, 34G) The jacket is cute otherwise an I’ll wear it open but it’s not as cute that way. I do wish this came in a extra large though. So if your thinking about getting this size up but if your are already a large it might not be a good fit. Hope this helps.